diff --git a/lib/components/src/controls/options/Select.tsx b/lib/components/src/controls/options/Select.tsx
index bfaa91ef8d88..9b066f0b9e10 100644
--- a/lib/components/src/controls/options/Select.tsx
+++ b/lib/components/src/controls/options/Select.tsx
@@ -20,6 +20,7 @@ const styleResets: CSSObject = {
 const OptionsSelect = styled.select(({ theme }) => ({
   ...styleResets,
 
+  boxSizing: 'border-box',
   position: 'relative',
   padding: '6px 10px',
   width: '100%',