diff --git a/src/bind.rs b/src/bind.rs
index 6bfa8a3..b6ec55d 100644
--- a/src/bind.rs
+++ b/src/bind.rs
@@ -98,6 +98,13 @@ impl From<Bind> for Element {
 mod tests {
     use super::*;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Bind, 40);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Bind, 80);
diff --git a/src/blocking.rs b/src/blocking.rs
index 87a2fbd..cd3f8fd 100644
--- a/src/blocking.rs
+++ b/src/blocking.rs
@@ -98,6 +98,16 @@ generate_empty_element!(
 mod tests {
     use super::*;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(BlocklistRequest, 0);
+        assert_size!(BlocklistResult, 12);
+        assert_size!(Block, 12);
+        assert_size!(Unblock, 12);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(BlocklistRequest, 0);
diff --git a/src/bookmarks.rs b/src/bookmarks.rs
index 8ae0639..7f68930 100644
--- a/src/bookmarks.rs
+++ b/src/bookmarks.rs
@@ -74,6 +74,15 @@ mod tests {
     use minidom::Element;
     use compare_elements::NamespaceAwareCompare;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Conference, 76);
+        assert_size!(Url, 24);
+        assert_size!(Storage, 24);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Conference, 152);
diff --git a/src/caps.rs b/src/caps.rs
index 7fcaea8..22ac193 100644
--- a/src/caps.rs
+++ b/src/caps.rs
@@ -211,6 +211,13 @@ mod tests {
     use caps;
     use base64;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Caps, 52);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Caps, 104);
diff --git a/src/component.rs b/src/component.rs
index 503e103..0c9319c 100644
--- a/src/component.rs
+++ b/src/component.rs
@@ -47,6 +47,13 @@ mod tests {
     use try_from::TryFrom;
     use minidom::Element;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Handshake, 12);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Handshake, 24);
diff --git a/src/data_forms.rs b/src/data_forms.rs
index 3fccd72..edf2608 100644
--- a/src/data_forms.rs
+++ b/src/data_forms.rs
@@ -268,6 +268,17 @@ impl From<DataForm> for Element {
 mod tests {
     use super::*;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Option_, 24);
+        assert_size!(FieldType, 1);
+        assert_size!(Field, 64);
+        assert_size!(DataFormType, 1);
+        assert_size!(DataForm, 52);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Option_, 48);
diff --git a/src/delay.rs b/src/delay.rs
index c4f7518..46fec0f 100644
--- a/src/delay.rs
+++ b/src/delay.rs
@@ -39,6 +39,13 @@ mod tests {
     use error::Error;
     use std::str::FromStr;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Delay, 64);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Delay, 112);
diff --git a/src/disco.rs b/src/disco.rs
index 7b43553..7be0efc 100644
--- a/src/disco.rs
+++ b/src/disco.rs
@@ -235,6 +235,20 @@ mod tests {
     use compare_elements::NamespaceAwareCompare;
     use std::str::FromStr;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Identity, 48);
+        assert_size!(Feature, 12);
+        assert_size!(DiscoInfoQuery, 12);
+        assert_size!(DiscoInfoResult, 48);
+
+        assert_size!(Item, 60);
+        assert_size!(DiscoItemsQuery, 12);
+        assert_size!(DiscoItemsResult, 24);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Identity, 96);
diff --git a/src/ecaps2.rs b/src/ecaps2.rs
index d4811b5..ea5e03d 100644
--- a/src/ecaps2.rs
+++ b/src/ecaps2.rs
@@ -152,6 +152,13 @@ mod tests {
     use minidom::Element;
     use error::Error;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(ECaps2, 12);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(ECaps2, 24);
diff --git a/src/eme.rs b/src/eme.rs
index 271b842..417bbe5 100644
--- a/src/eme.rs
+++ b/src/eme.rs
@@ -28,6 +28,13 @@ mod tests {
     use minidom::Element;
     use error::Error;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(ExplicitMessageEncryption, 24);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(ExplicitMessageEncryption, 48);
diff --git a/src/forwarding.rs b/src/forwarding.rs
index fbfacb1..11efb61 100644
--- a/src/forwarding.rs
+++ b/src/forwarding.rs
@@ -30,6 +30,13 @@ mod tests {
     use minidom::Element;
     use error::Error;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Forwarded, 204);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Forwarded, 392);
diff --git a/src/hashes.rs b/src/hashes.rs
index 7063dbc..5fbf5b9 100644
--- a/src/hashes.rs
+++ b/src/hashes.rs
@@ -133,6 +133,14 @@ mod tests {
     use try_from::TryFrom;
     use minidom::Element;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Algo, 16);
+        assert_size!(Hash, 28);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Algo, 32);
diff --git a/src/ibb.rs b/src/ibb.rs
index e595fe4..87b335e 100644
--- a/src/ibb.rs
+++ b/src/ibb.rs
@@ -76,6 +76,16 @@ mod tests {
     use error::Error;
     use std::error::Error as StdError;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Stanza, 1);
+        assert_size!(Open, 16);
+        assert_size!(Data, 28);
+        assert_size!(Close, 12);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Stanza, 1);
diff --git a/src/ibr.rs b/src/ibr.rs
index 71256b6..4d76a9d 100644
--- a/src/ibr.rs
+++ b/src/ibr.rs
@@ -96,6 +96,13 @@ mod tests {
     use super::*;
     use compare_elements::NamespaceAwareCompare;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Query, 88);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Query, 152);
diff --git a/src/iq.rs b/src/iq.rs
index b5f27bf..ff1e7b1 100644
--- a/src/iq.rs
+++ b/src/iq.rs
@@ -226,6 +226,14 @@ mod tests {
     use compare_elements::NamespaceAwareCompare;
     use disco::DiscoInfoQuery;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(IqType, 108);
+        assert_size!(Iq, 192);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(IqType, 216);
diff --git a/src/jingle.rs b/src/jingle.rs
index 38577f8..7e4ea82 100644
--- a/src/jingle.rs
+++ b/src/jingle.rs
@@ -533,6 +533,22 @@ impl From<Jingle> for Element {
 mod tests {
     use super::*;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Action, 1);
+        assert_size!(Creator, 1);
+        assert_size!(Senders, 1);
+        assert_size!(Disposition, 1);
+        assert_size!(ContentId, 12);
+        assert_size!(Content, 172);
+        assert_size!(Reason, 1);
+        assert_size!(ReasonElement, 16);
+        assert_size!(SessionId, 12);
+        assert_size!(Jingle, 128);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Action, 1);
diff --git a/src/jingle_ft.rs b/src/jingle_ft.rs
index 0a3c022..604e6ee 100644
--- a/src/jingle_ft.rs
+++ b/src/jingle_ft.rs
@@ -348,6 +348,17 @@ mod tests {
     use hashes::Algo;
     use base64;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Range, 40);
+        assert_size!(File, 128);
+        assert_size!(Description, 128);
+        assert_size!(Checksum, 144);
+        assert_size!(Received, 16);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Range, 48);
diff --git a/src/jingle_ibb.rs b/src/jingle_ibb.rs
index c56c73d..e02a434 100644
--- a/src/jingle_ibb.rs
+++ b/src/jingle_ibb.rs
@@ -29,6 +29,13 @@ mod tests {
     use error::Error;
     use std::error::Error as StdError;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Transport, 16);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Transport, 32);
diff --git a/src/jingle_message.rs b/src/jingle_message.rs
index 150e7a0..1bef326 100644
--- a/src/jingle_message.rs
+++ b/src/jingle_message.rs
@@ -121,6 +121,13 @@ impl From<JingleMI> for Element {
 mod tests {
     use super::*;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(JingleMI, 68);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(JingleMI, 136);
diff --git a/src/jingle_s5b.rs b/src/jingle_s5b.rs
index a5fdff0..904a4d7 100644
--- a/src/jingle_s5b.rs
+++ b/src/jingle_s5b.rs
@@ -277,6 +277,19 @@ mod tests {
     use std::str::FromStr;
     use compare_elements::NamespaceAwareCompare;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Type, 1);
+        assert_size!(Mode, 1);
+        assert_size!(CandidateId, 12);
+        assert_size!(StreamId, 12);
+        assert_size!(Candidate, 80);
+        assert_size!(TransportPayload, 16);
+        assert_size!(Transport, 44);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Type, 1);
diff --git a/src/mam.rs b/src/mam.rs
index 4456412..819bc46 100644
--- a/src/mam.rs
+++ b/src/mam.rs
@@ -191,6 +191,19 @@ mod tests {
     use super::*;
     use std::str::FromStr;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(QueryId, 12);
+        assert_size!(Query, 116);
+        assert_size!(Result_, 228);
+        assert_size!(Complete, 1);
+        assert_size!(Fin, 44);
+        assert_size!(DefaultPrefs, 1);
+        assert_size!(Prefs, 28);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(QueryId, 24);
diff --git a/src/media_element.rs b/src/media_element.rs
index 722780f..dc0c2af 100644
--- a/src/media_element.rs
+++ b/src/media_element.rs
@@ -51,6 +51,14 @@ mod tests {
     use data_forms::DataForm;
     use std::error::Error as StdError;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(URI, 24);
+        assert_size!(MediaElement, 28);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(URI, 48);
diff --git a/src/message.rs b/src/message.rs
index 2e9d9c6..9c392b7 100644
--- a/src/message.rs
+++ b/src/message.rs
@@ -234,6 +234,17 @@ mod tests {
     use std::str::FromStr;
     use compare_elements::NamespaceAwareCompare;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(MessageType, 1);
+        assert_size!(Body, 12);
+        assert_size!(Subject, 12);
+        assert_size!(Thread, 12);
+        assert_size!(Message, 136);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(MessageType, 1);
diff --git a/src/message_correct.rs b/src/message_correct.rs
index e8233ee..06b433f 100644
--- a/src/message_correct.rs
+++ b/src/message_correct.rs
@@ -25,6 +25,13 @@ mod tests {
     use minidom::Element;
     use error::Error;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Replace, 12);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Replace, 24);
diff --git a/src/mood.rs b/src/mood.rs
index 6bf8bd2..5920432 100644
--- a/src/mood.rs
+++ b/src/mood.rs
@@ -272,6 +272,14 @@ mod tests {
     use try_from::TryFrom;
     use minidom::Element;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(MoodEnum, 1);
+        assert_size!(Text, 12);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(MoodEnum, 1);
diff --git a/src/nick.rs b/src/nick.rs
index 2d2f90c..7a36665 100644
--- a/src/nick.rs
+++ b/src/nick.rs
@@ -16,6 +16,13 @@ mod tests {
     use minidom::Element;
     use error::Error;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Nick, 12);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Nick, 24);
diff --git a/src/presence.rs b/src/presence.rs
index 02a9a9c..db6ac7a 100644
--- a/src/presence.rs
+++ b/src/presence.rs
@@ -323,6 +323,15 @@ mod tests {
     use super::*;
     use compare_elements::NamespaceAwareCompare;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Show, 1);
+        assert_size!(Type, 1);
+        assert_size!(Presence, 112);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Show, 1);
diff --git a/src/receipts.rs b/src/receipts.rs
index ecf0a21..49759c7 100644
--- a/src/receipts.rs
+++ b/src/receipts.rs
@@ -33,6 +33,14 @@ mod tests {
     use minidom::Element;
     use ns;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Request, 0);
+        assert_size!(Received, 12);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Request, 0);
diff --git a/src/roster.rs b/src/roster.rs
index eeebddf..c1f8641 100644
--- a/src/roster.rs
+++ b/src/roster.rs
@@ -85,6 +85,16 @@ mod tests {
     use std::str::FromStr;
     use compare_elements::NamespaceAwareCompare;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Group, 12);
+        assert_size!(Subscription, 1);
+        assert_size!(Item, 64);
+        assert_size!(Roster, 24);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Group, 24);
diff --git a/src/rsm.rs b/src/rsm.rs
index 2f17693..fb321fa 100644
--- a/src/rsm.rs
+++ b/src/rsm.rs
@@ -158,6 +158,14 @@ mod tests {
     use super::*;
     use compare_elements::NamespaceAwareCompare;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(SetQuery, 40);
+        assert_size!(SetResult, 40);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(SetQuery, 80);
diff --git a/src/sasl.rs b/src/sasl.rs
index 5272fd0..1ec44af 100644
--- a/src/sasl.rs
+++ b/src/sasl.rs
@@ -215,6 +215,20 @@ mod tests {
     use try_from::TryFrom;
     use minidom::Element;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Mechanism, 1);
+        assert_size!(Auth, 16);
+        assert_size!(Challenge, 12);
+        assert_size!(Response, 12);
+        assert_size!(Abort, 0);
+        assert_size!(Success, 12);
+        assert_size!(DefinedCondition, 1);
+        assert_size!(Failure, 16);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Mechanism, 1);
diff --git a/src/sm.rs b/src/sm.rs
index dfc3dff..404b54e 100644
--- a/src/sm.rs
+++ b/src/sm.rs
@@ -144,6 +144,22 @@ mod tests {
     use try_from::TryFrom;
     use minidom::Element;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(A, 4);
+        assert_size!(ResumeAttr, 1);
+        assert_size!(Enable, 12);
+        assert_size!(StreamId, 12);
+        assert_size!(Enabled, 36);
+        assert_size!(Failed, 12);
+        assert_size!(R, 0);
+        assert_size!(Resume, 16);
+        assert_size!(Resumed, 16);
+        assert_size!(StreamManagement, 0);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(A, 4);
diff --git a/src/stanza_error.rs b/src/stanza_error.rs
index 480b1d8..750823d 100644
--- a/src/stanza_error.rs
+++ b/src/stanza_error.rs
@@ -289,6 +289,15 @@ impl From<StanzaError> for Element {
 mod tests {
     use super::*;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(ErrorType, 1);
+        assert_size!(DefinedCondition, 1);
+        assert_size!(StanzaError, 104);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(ErrorType, 1);
diff --git a/src/stanza_id.rs b/src/stanza_id.rs
index 9dc3698..e45b528 100644
--- a/src/stanza_id.rs
+++ b/src/stanza_id.rs
@@ -42,6 +42,14 @@ mod tests {
     use error::Error;
     use std::str::FromStr;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(StanzaId, 48);
+        assert_size!(OriginId, 12);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(StanzaId, 96);
diff --git a/src/stream.rs b/src/stream.rs
index b81ba77..ad8ec4f 100644
--- a/src/stream.rs
+++ b/src/stream.rs
@@ -76,6 +76,13 @@ mod tests {
     use try_from::TryFrom;
     use minidom::Element;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Stream, 108);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Stream, 216);
diff --git a/src/version.rs b/src/version.rs
index 7ed8974..cbd9583 100644
--- a/src/version.rs
+++ b/src/version.rs
@@ -43,6 +43,14 @@ mod tests {
     use minidom::Element;
     use compare_elements::NamespaceAwareCompare;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(VersionQuery, 0);
+        assert_size!(VersionResult, 36);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(VersionQuery, 0);
diff --git a/src/websocket.rs b/src/websocket.rs
index 2f87437..f2d28eb 100644
--- a/src/websocket.rs
+++ b/src/websocket.rs
@@ -75,6 +75,13 @@ mod tests {
     use try_from::TryFrom;
     use minidom::Element;
 
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(Open, 108);
+    }
+
+    #[cfg(target_pointer_width = "64")]
     #[test]
     fn test_size() {
         assert_size!(Open, 216);