diff --git a/src/admin/ui/Button.tsx b/src/admin/ui/Button.tsx
index e661473..259b1ed 100644
--- a/src/admin/ui/Button.tsx
+++ b/src/admin/ui/Button.tsx
@@ -14,11 +14,12 @@ export default function Button<C extends ElementType = "button">({
       variant="contained"
       color="primary"
       {...props}
-      // Keep labels on one line — flex layouts otherwise shrink a button and
-      // wrap its text onto two lines, making the button tall. Callers can still
-      // override via their own sx.
+      // Keep labels on one line and at their natural width — in flex rows MUI's
+      // default flexShrink:1 squeezes a button below its content, so the label
+      // either wrapped to two lines or (with nowrap) overflowed its padding and
+      // hit the edges. nowrap + flexShrink:0 keeps buttons crisp. Caller sx wins.
       sx={[
-        { whiteSpace: "nowrap" },
+        { whiteSpace: "nowrap", flexShrink: 0 },
         ...(Array.isArray(sx) ? sx : sx ? [sx] : []),
       ]}
     />