diff --git a/lib/src/message_input.dart b/lib/src/message_input.dart
index 3c9e9123..9372767e 100644
--- a/lib/src/message_input.dart
+++ b/lib/src/message_input.dart
@@ -627,6 +627,7 @@ class MessageInputState extends State<MessageInput> {
         icon: Icon(
           StreamIcons.lightning,
         ),
+        iconSize: 14.0,
       ),
     );
   }
@@ -638,6 +639,7 @@ class MessageInputState extends State<MessageInput> {
           showAttachmentModal();
         },
         icon: Icon(StreamIcons.attach),
+        iconSize: 14.0,
       ),
     );
   }
@@ -855,24 +857,21 @@ class MessageInputState extends State<MessageInput> {
   }
 
   Widget _buildIdleSendButton(BuildContext context) {
-    return SizedBox(
-      height: 24.0,
-      width: 16.0,
-      child: IconTheme(
-        data:
-            StreamChatTheme.of(context).channelTheme.messageInputButtonIconTheme,
-        child: Padding(
-          padding: const EdgeInsets.all(8.0),
-          child: Center(
-            child: IconButton(
-              key: Key('sendButtonIdle'),
-              onPressed: () {
-                sendMessage();
-              },
-              icon: Icon(
-                StreamIcons.send_message,
-                color: Colors.grey,
-              ),
+    return IconTheme(
+      data:
+          StreamChatTheme.of(context).channelTheme.messageInputButtonIconTheme,
+      child: Padding(
+        padding: const EdgeInsets.all(8.0),
+        child: Center(
+          child: IconButton(
+            iconSize: 14.0,
+            key: Key('sendButtonIdle'),
+            onPressed: () {
+              sendMessage();
+            },
+            icon: Icon(
+              StreamIcons.send_message,
+              color: Colors.grey,
             ),
           ),
         ),
@@ -881,24 +880,21 @@ class MessageInputState extends State<MessageInput> {
   }
 
   Widget _buildSendButton(BuildContext context) {
-    return SizedBox(
-      height: 24.0,
-      width: 16.0,
-      child: IconTheme(
-        data:
-            StreamChatTheme.of(context).channelTheme.messageInputButtonIconTheme,
-        child: Center(
-          child: Padding(
-            padding: const EdgeInsets.all(8.0),
-            child: IconButton(
-              key: Key('sendButton'),
-              onPressed: () {
-                sendMessage();
-              },
-              icon: Icon(
-                StreamIcons.send_message,
-                color: StreamChatTheme.of(context).accentColor,
-              ),
+    return IconTheme(
+      data:
+          StreamChatTheme.of(context).channelTheme.messageInputButtonIconTheme,
+      child: Center(
+        child: Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: IconButton(
+            iconSize: 14.0,
+            key: Key('sendButton'),
+            onPressed: () {
+              sendMessage();
+            },
+            icon: Icon(
+              StreamIcons.send_message,
+              color: StreamChatTheme.of(context).accentColor,
             ),
           ),
         ),