diff --git a/mon-entreprise/source/design-system/styled.d.ts b/mon-entreprise/source/design-system/styled.d.ts
index 9bdd5e9f1..0fc41e6ef 100644
--- a/mon-entreprise/source/design-system/styled.d.ts
+++ b/mon-entreprise/source/design-system/styled.d.ts
@@ -21,12 +21,13 @@ type SmallPalette = {
 	500: Color
 	600: Color
 }
+type Metric = string
 
-type Spacing = string
+type Spacing = Metric
 
 type Font = string
 
-type FontSize = string
+type FontSize = Metric
 
 declare module 'styled-components' {
 	export interface DefaultTheme {
@@ -70,5 +71,11 @@ declare module 'styled-components' {
 		}
 
 		baseFontSize: FontSize
+
+		box: {
+			borderRadius: Metric
+			borderWidth: Metric
+			borderWidthLarge: Metric
+		}
 	}
 }
diff --git a/mon-entreprise/source/design-system/theme.ts b/mon-entreprise/source/design-system/theme.ts
index 4ac2ad3af..8ac285d30 100644
--- a/mon-entreprise/source/design-system/theme.ts
+++ b/mon-entreprise/source/design-system/theme.ts
@@ -129,12 +129,12 @@ export const theme: DefaultTheme = {
 	spacings: {
 		xxs: '.25rem',
 		xs: '.5rem',
-		sm: '1rem',
-		md: '1.5rem',
-		lg: '2rem',
-		xl: '3rem',
-		xxl: '4rem',
-		xxxl: '8rem',
+		sm: '0.75rem',
+		md: '1rem',
+		lg: '1.5rem',
+		xl: '2rem',
+		xxl: '2.5rem',
+		xxxl: '3.25rem',
 	},
 
 	fonts: {
@@ -143,4 +143,10 @@ export const theme: DefaultTheme = {
 	},
 
 	baseFontSize: '16px',
+
+	box: {
+		borderRadius: '6px',
+		borderWidth: '1px',
+		borderWidthLarge: '2px',
+	},
 }