diff --git a/packages/core/docs/vibe-3-changelog.md b/packages/core/docs/vibe-3-changelog.md
index 1da046ff18..8fd84a7534 100644
--- a/packages/core/docs/vibe-3-changelog.md
+++ b/packages/core/docs/vibe-3-changelog.md
@@ -37,6 +37,7 @@ codemod: `avatar-component-migration`
 
 - `dataTestId` -> `data-testid` [codemod]
 - `children` prop is now mandatory
+- Removed `sm`, `md`, `lg` sizes, use `small`, `medium`, `large` accordingly
 
 ### ButtonGroup
 
diff --git a/packages/core/src/components/Button/ButtonConstants.ts b/packages/core/src/components/Button/ButtonConstants.ts
index 9efd104d0d..51afa5365f 100644
--- a/packages/core/src/components/Button/ButtonConstants.ts
+++ b/packages/core/src/components/Button/ButtonConstants.ts
@@ -24,13 +24,7 @@ export enum ButtonColor {
   // FIXED_DARK = "fixed-dark"
 }
 
-export const OLD_BUTTON_SIZES = {
-  sm: SIZES.SMALL,
-  md: SIZES.MEDIUM,
-  lg: SIZES.LARGE
-} as const;
-
-export type Size = (typeof SIZES)[keyof typeof SIZES] | keyof typeof OLD_BUTTON_SIZES;
+export type Size = (typeof SIZES)[keyof typeof SIZES];
 
 export const BUTTON_KIND_CLASS_NAMES = {
   PRIMARY: ""