diff --git a/frontend/src/components/sidebar/StackRow.tsx b/frontend/src/components/sidebar/StackRow.tsx
index d28c28c4..eb7dd9d2 100644
--- a/frontend/src/components/sidebar/StackRow.tsx
+++ b/frontend/src/components/sidebar/StackRow.tsx
@@ -38,7 +38,7 @@ function RowTooltip({ trigger, label }: { trigger: ReactNode; label: string }) {
       <Tooltip>
         <TooltipTrigger asChild>{trigger}</TooltipTrigger>
         <TooltipContent side="bottom" sideOffset={4} align="center">
-          {label}
+          <span className="font-mono text-xs tabular-nums text-stat-value">{label}</span>
         </TooltipContent>
       </Tooltip>
     </TooltipProvider>