diff --git a/src/components/Chart/index.ts b/src/components/Chart/index.ts
index c22517f..8e63028 100644
--- a/src/components/Chart/index.ts
+++ b/src/components/Chart/index.ts
@@ -48,3 +48,5 @@ export type { FunnelChartProps, FunnelStage } from './FunnelChart';
 
 export { Waterfall } from './WaterfallChart';
 export type { WaterfallChartProps, WaterfallSegment } from './WaterfallChart';
+
+export { BAR_GROUP_GAP, BAR_ITEM_GAP } from './types';
diff --git a/src/components/Chart/types.ts b/src/components/Chart/types.ts
index 5e7a5f1..68be75e 100644
--- a/src/components/Chart/types.ts
+++ b/src/components/Chart/types.ts
@@ -102,7 +102,9 @@ export function resolveSeries(
   return [];
 }
 
+/** Fraction of each category slot left as gap; bars fill the remainder. */
 export const BAR_GROUP_GAP = 0.12;
+/** Horizontal px between side-by-side series bars within one category group. */
 export const BAR_ITEM_GAP = 1;
 
 /** Minimum vertical spacing (px) between tick labels at 11px font. */