diff --git a/web/styles/app_variables.css b/web/styles/app_variables.css
index 040d2b1294..e7fd50e847 100644
--- a/web/styles/app_variables.css
+++ b/web/styles/app_variables.css
@@ -166,7 +166,8 @@
     --message-box-markdown-aligned-vertical-space: var(
         --markdown-interelement-space-px
     );
-    --message-box-icon-width: 26px;
+    /* 22px matches to the width of the padded icon. */
+    --message-box-icon-width: 22px;
     --message-box-icon-height: 25px;
     --message-box-height-senderless-single-line-message: calc(
         var(--base-line-height-unitless) * var(--base-font-size-px) +