diff --git a/packages/react/src/components/DataTable/__tests__/__snapshots__/DataTable-test.js.snap b/packages/react/src/components/DataTable/__tests__/__snapshots__/DataTable-test.js.snap
index eba6b6f416fe..069e22c8ff6a 100644
--- a/packages/react/src/components/DataTable/__tests__/__snapshots__/DataTable-test.js.snap
+++ b/packages/react/src/components/DataTable/__tests__/__snapshots__/DataTable-test.js.snap
@@ -551,7 +551,7 @@ exports[`DataTable behaves as expected selection should render and match snapsho
               aria-expanded="false"
               aria-haspopup="true"
               aria-labelledby="tooltip-73"
-              class="cds--btn--icon-only cds--toolbar-action cds--overflow-menu cds--overflow-menu cds--overflow-menu--md cds--btn cds--btn--md cds--btn--primary"
+              class="cds--btn--icon-only cds--toolbar-action cds--overflow-menu cds--overflow-menu cds--overflow-menu--md cds--btn cds--btn--primary"
               title="Settings"
               type="button"
             >
@@ -954,7 +954,7 @@ exports[`DataTable renders as expected - Component API should render and match s
               aria-expanded="false"
               aria-haspopup="true"
               aria-labelledby="tooltip-18"
-              class="cds--btn--icon-only cds--toolbar-action cds--overflow-menu cds--overflow-menu cds--overflow-menu--md cds--btn cds--btn--md cds--btn--primary"
+              class="cds--btn--icon-only cds--toolbar-action cds--overflow-menu cds--overflow-menu cds--overflow-menu--md cds--btn cds--btn--primary"
               title="Settings"
               type="button"
             >
diff --git a/packages/react/src/components/DataTable/__tests__/__snapshots__/TableToolbarMenu-test.js.snap b/packages/react/src/components/DataTable/__tests__/__snapshots__/TableToolbarMenu-test.js.snap
index b8b4c701697e..df759317810c 100644
--- a/packages/react/src/components/DataTable/__tests__/__snapshots__/TableToolbarMenu-test.js.snap
+++ b/packages/react/src/components/DataTable/__tests__/__snapshots__/TableToolbarMenu-test.js.snap
@@ -12,7 +12,7 @@ exports[`TableToolbarMenu renders as expected - Component API should render 1`]
         aria-expanded="false"
         aria-haspopup="true"
         aria-labelledby="tooltip-2"
-        class="cds--btn--icon-only custom-class cds--toolbar-action cds--overflow-menu cds--overflow-menu cds--overflow-menu--md cds--btn cds--btn--md cds--btn--primary"
+        class="cds--btn--icon-only custom-class cds--toolbar-action cds--overflow-menu cds--overflow-menu cds--overflow-menu--md cds--btn cds--btn--primary"
         title="Add"
         type="button"
       >
diff --git a/packages/react/src/components/IconButton/index.js b/packages/react/src/components/IconButton/index.js
index 16a7b12b7ab9..9594068cd642 100644
--- a/packages/react/src/components/IconButton/index.js
+++ b/packages/react/src/components/IconButton/index.js
@@ -22,7 +22,7 @@ const IconButton = React.forwardRef(function IconButton(props, ref) {
     kind,
     label,
     leaveDelayMs,
-    size = 'md',
+    size = 'lg',
     ...rest
   } = props;
   const prefix = usePrefix();
@@ -102,7 +102,7 @@ IconButton.propTypes = {
   leaveDelayMs: PropTypes.number,
 
   /**
-   * Specify the size of the Button. Defaults to `md`.
+   * Specify the size of the Button. Defaults to `lg`.
    */
   size: PropTypes.oneOf(['sm', 'md', 'lg']),
 };