diff --git a/.changeset/khaki-rocks-fix.md b/.changeset/khaki-rocks-fix.md
new file mode 100644
index 0000000000..16e11c9d7b
--- /dev/null
+++ b/.changeset/khaki-rocks-fix.md
@@ -0,0 +1,6 @@
+---
+"@twilio-paste/user-dialog": patch
+"@twilio-paste/core": patch
+---
+
+Update the size of the UserDialog's inner Avatar component.
diff --git a/packages/paste-core/components/user-dialog/src/UserDialog.tsx b/packages/paste-core/components/user-dialog/src/UserDialog.tsx
index 5ef33914ff..539eebd49f 100644
--- a/packages/paste-core/components/user-dialog/src/UserDialog.tsx
+++ b/packages/paste-core/components/user-dialog/src/UserDialog.tsx
@@ -93,7 +93,7 @@ export const UserDialog = React.forwardRef<HTMLDivElement, UserDialogProps>(
           >
             <Avatar
               variant="user"
-              size="sizeIcon70"
+              size="sizeIcon40"
               name={avatarProps.name}
               icon={avatarProps.icon}
               src={avatarProps.src}