diff --git a/.changeset/weak-roses-doubt.md b/.changeset/weak-roses-doubt.md
new file mode 100644
index 00000000000..c5b319de9bc
--- /dev/null
+++ b/.changeset/weak-roses-doubt.md
@@ -0,0 +1,5 @@
+---
+'@shopify/polaris': patch
+---
+
+Fixed styling on `IndexTable` component header tooltip
diff --git a/polaris-react/src/components/IndexTable/IndexTable.tsx b/polaris-react/src/components/IndexTable/IndexTable.tsx
index 73352705d0c..e90d7e6a31e 100644
--- a/polaris-react/src/components/IndexTable/IndexTable.tsx
+++ b/polaris-react/src/components/IndexTable/IndexTable.tsx
@@ -902,8 +902,8 @@ function IndexTableBase({
 
     const defaultHeaderTooltipProps = {
       ...defaultTooltipProps,
-      padding: '4' as Padding,
-      borderRadius: '2' as BorderRadius,
+      padding: '400' as Padding,
+      borderRadius: '200' as BorderRadius,
       content: heading.tooltipContent,
       preferredPosition: 'above' as TooltipOverlayProps['preferredPosition'],
     };