diff --git a/.claude/rules/emcn-components.md b/.claude/rules/emcn-components.md
index f02ff3946e5..fd57ee5c00c 100644
--- a/.claude/rules/emcn-components.md
+++ b/.claude/rules/emcn-components.md
@@ -56,3 +56,17 @@ Declare keyboard intent on the action-owning primitive; never add document-level
 - Use Radix UI primitives for accessibility. Export the component and its `variants` (when using CVA). Document with TSDoc + a usage example.
 
 Color tokens and icon-size conventions are canonical in `.claude/rules/sim-styling.md` — follow it rather than restating.
+
+
+## Ordinary Button action geometry
+
+`Button` retains its existing appearance variants. For square actions use `iconSize`:
+`compact` (24px on the spacing scale), `compact-fixed` (24px), `regular` (28px),
+`roomy` (32px), or `touch` (40px). These values follow the root spacing scale;
+only `compact-fixed` stays fixed when root text is enlarged.
+Use `{ base: 'touch', sm: 'regular' }` for mobile/desktop targets. These props own
+geometry only; colour, radius and SVG stroke continue to come from the selected
+`variant` and `size`. `iconPadding` explicitly overrides the zero-padding geometry.
+Use `shape='round'` for circular actions, or omit it to retain the current radius.
+`size='inline'` is a 20px-high action with caption typography and compact horizontal
+padding. Prefer these supported props to size, padding and radius overrides.
diff --git a/.cursor/rules/emcn-components.mdc b/.cursor/rules/emcn-components.mdc
index 1ac5fc577f8..3f5cd1bf90e 100644
--- a/.cursor/rules/emcn-components.mdc
+++ b/.cursor/rules/emcn-components.mdc
@@ -57,3 +57,17 @@ Declare keyboard intent on the action-owning primitive; never add document-level
 - Use Radix UI primitives for accessibility. Export the component and its `variants` (when using CVA). Document with TSDoc + a usage example.
 
 Color tokens and icon-size conventions are canonical in `.claude/rules/sim-styling.md` — follow it rather than restating.
+
+
+## Ordinary Button action geometry
+
+`Button` retains its existing appearance variants. For square actions use `iconSize`:
+`compact` (24px on the spacing scale), `compact-fixed` (24px), `regular` (28px),
+`roomy` (32px), or `touch` (40px). These values follow the root spacing scale;
+only `compact-fixed` stays fixed when root text is enlarged.
+Use `{ base: 'touch', sm: 'regular' }` for mobile/desktop targets. These props own
+geometry only; colour, radius and SVG stroke continue to come from the selected
+`variant` and `size`. `iconPadding` explicitly overrides the zero-padding geometry.
+Use `shape='round'` for circular actions, or omit it to retain the current radius.
+`size='inline'` is a 20px-high action with caption typography and compact horizontal
+padding. Prefer these supported props to size, padding and radius overrides.
diff --git a/apps/sim/app/workspace/[workspaceId]/logs/components/log-details/components/file-download/file-download.tsx b/apps/sim/app/workspace/[workspaceId]/logs/components/log-details/components/file-download/file-download.tsx
index 8d310f38b29..064baa45326 100644
--- a/apps/sim/app/workspace/[workspaceId]/logs/components/log-details/components/file-download/file-download.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/logs/components/log-details/components/file-download/file-download.tsx
@@ -106,11 +106,7 @@ function FileCard({ file, isExecutionFile = false, workspaceId }: FileCardProps)
           {file.type}
           {file.version === undefined ? '' : ` · v${file.version}`}
         </span>
-        <Button
-          variant='ghost'
-          className='h-[20px]! px-1.5! py-0! text-xs'
-          onClick={handleDownload}
-        >
+        <Button variant='ghost' size='inline' onClick={handleDownload}>
           <Download className='mr-1 size-[10px]' />
           Download
         </Button>
diff --git a/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/select-field/select-options-editor.tsx b/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/select-field/select-options-editor.tsx
index f15e2c82ef6..93f746d7c44 100644
--- a/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/select-field/select-options-editor.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/select-field/select-options-editor.tsx
@@ -79,7 +79,8 @@ export function SelectOptionsEditor({ options, onChange }: SelectOptionsEditorPr
             size='sm'
             onClick={() => remove(option.id)}
             iconPadding='sm'
-            className='size-7 shrink-0'
+            iconSize='regular'
+            className='shrink-0'
             aria-label={`Remove ${option.name || 'option'}`}
           >
             <X className='size-[12px]' />
diff --git a/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/table-filter/table-filter.tsx b/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/table-filter/table-filter.tsx
index 8fe52025569..c005de9d781 100644
--- a/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/table-filter/table-filter.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/table-filter/table-filter.tsx
@@ -383,7 +383,8 @@ const FilterRuleRow = memo(function FilterRuleRow({
         size='sm'
         onClick={() => onRemove(rule.id)}
         iconPadding='sm'
-        className='size-7 shrink-0'
+        iconSize='regular'
+        className='shrink-0'
         aria-label='Remove filter'
       >
         <X className='size-[12px]' />
diff --git a/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/table-grid/table-primitives.tsx b/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/table-grid/table-primitives.tsx
index fab52045ad8..477ab19c88b 100644
--- a/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/table-grid/table-primitives.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/tables/[tableId]/components/table-grid/table-primitives.tsx
@@ -72,11 +72,8 @@ export const AddRowButton = React.memo(function AddRowButton({
     <Button
       type='button'
       variant='ghost'
-      size='sm'
-      className={cn(
-        'h-[20px] gap-2 p-0 text-[var(--text-body)]',
-        blockedReason && 'cursor-not-allowed opacity-50'
-      )}
+      size='inline'
+      className={cn('gap-2', blockedReason && 'cursor-not-allowed opacity-50')}
       aria-disabled={blockedReason ? true : undefined}
       onClick={blockedReason ? undefined : onClick}
     >
diff --git a/packages/emcn/src/components/bulk-action-button/bulk-action-button.tsx b/packages/emcn/src/components/bulk-action-button/bulk-action-button.tsx
index 8088e98f093..e9717c2f7b9 100644
--- a/packages/emcn/src/components/bulk-action-button/bulk-action-button.tsx
+++ b/packages/emcn/src/components/bulk-action-button/bulk-action-button.tsx
@@ -19,7 +19,7 @@ export const bulkActionButtonVariants = cva(
 )
 
 export interface BulkActionButtonProps
-  extends Omit<ButtonProps, 'variant' | 'size' | 'iconPadding' | 'iconSize'> {
+  extends Omit<ButtonProps, 'variant' | 'size' | 'iconPadding' | 'iconSize' | 'shape'> {
   /** Accessible name for the icon action; tooltip content is supplied separately. */
   'aria-label': string
   /**
diff --git a/packages/emcn/src/components/button/button.test.tsx b/packages/emcn/src/components/button/button.test.tsx
index c0b4fc35df3..4c8cae79dc0 100644
--- a/packages/emcn/src/components/button/button.test.tsx
+++ b/packages/emcn/src/components/button/button.test.tsx
@@ -1,5 +1,7 @@
-/** @vitest-environment node */
+/** @vitest-environment jsdom */
 /** biome-ignore assist/source/organizeImports: Preserve the documented core/external/UI import order. */
+import { act, createRef } from 'react'
+import { createRoot } from 'react-dom/client'
 import { renderToStaticMarkup } from 'react-dom/server'
 import { describe, expect, it } from 'vitest'
 import { Button } from '@sim/emcn'
@@ -22,6 +24,9 @@ describe('Button iconSize', () => {
   for (const [iconSize, previousClass] of [
     ['compact', 'size-6 p-0'],
     ['compact-fixed', 'size-[24px] p-0'],
+    ['regular', 'size-7 p-0'],
+    ['roomy', 'size-8 p-0'],
+    ['touch', 'size-10 p-0'],
   ] as const) {
     it.each(TREATMENTS)(
       `preserves the ${iconSize} treatment with size=$size and variant=$variant`,
@@ -65,3 +70,82 @@ describe('Button iconSize', () => {
     expect(markup).not.toContain('iconPadding')
   })
 })
+
+describe('Button shared action geometry', () => {
+  it('composes responsive geometry, explicit padding and round shape without changing icon treatment', () => {
+    const markup = renderToStaticMarkup(
+      <Button
+        variant='ghost'
+        size='icon'
+        iconSize={{ base: 'touch', sm: 'regular' }}
+        iconPadding='sm'
+        shape='round'
+        aria-label='Edit'
+      >
+        <svg strokeWidth={1.55} />
+      </Button>
+    )
+    expect(markup).toContain('size-10')
+    expect(markup).toContain('sm:size-7')
+    expect(markup).not.toContain('size-[20px]')
+    expect(markup).toContain('p-1')
+    expect(markup).not.toContain('p-0')
+    expect(markup).toContain('rounded-full')
+    expect(markup).not.toContain('rounded-sm')
+    expect(markup).toContain('[stroke-width:1.25]')
+    expect(markup).toContain('text-[var(--text-icon-muted)]')
+    expect(markup).not.toMatch(/(?:iconSize|iconPadding|shape)=/)
+  })
+
+  it('retains an inline caption size and supports a base-only responsive value', () => {
+    const inline = renderToStaticMarkup(<Button size='inline'>Generate</Button>)
+    expect(inline).toContain('h-[20px]')
+    expect(inline).toContain('text-caption')
+    expect(inline).toContain('px-1.5 py-0')
+    const baseOnly = renderToStaticMarkup(<Button iconSize={{ base: 'roomy' }} aria-label='Run' />)
+    expect(baseOnly).toContain('size-8')
+    expect(baseOnly).not.toContain('sm:size')
+  })
+
+  it('forwards refs and native focus, submission and disabled behavior with responsive sizing', () => {
+    const container = document.createElement('div')
+    document.body.appendChild(container)
+    const root = createRoot(container)
+    const ref = createRef<HTMLButtonElement>()
+    let submissions = 0
+    ;(globalThis as { IS_REACT_ACT_ENVIRONMENT?: boolean }).IS_REACT_ACT_ENVIRONMENT = true
+    const render = (disabled: boolean) =>
+      act(() =>
+        root.render(
+          <form
+            onSubmit={(event) => {
+              event.preventDefault()
+              submissions++
+            }}
+          >
+            <Button
+              ref={ref}
+              type='submit'
+              iconSize={{ base: 'touch', sm: 'regular' }}
+              disabled={disabled}
+              aria-label='Apply'
+            />
+          </form>
+        )
+      )
+    try {
+      render(false)
+      ref.current?.focus()
+      expect(document.activeElement).toBe(ref.current)
+      act(() => ref.current?.click())
+      expect(submissions).toBe(1)
+      render(true)
+      act(() => ref.current?.click())
+      expect(submissions).toBe(1)
+      expect(ref.current?.disabled).toBe(true)
+    } finally {
+      act(() => root.unmount())
+      container.remove()
+    }
+  })
+})
diff --git a/packages/emcn/src/components/button/button.tsx b/packages/emcn/src/components/button/button.tsx
index bc2d2c6ef66..cc93c956b25 100644
--- a/packages/emcn/src/components/button/button.tsx
+++ b/packages/emcn/src/components/button/button.tsx
@@ -49,10 +49,17 @@ const buttonVariants = cva(
         sm: 'px-1.5 py-1 text-[length:11px]',
         md: 'px-2 py-1.5 text-[length:12px]',
         icon: 'size-[20px] rounded-sm p-0 [&_svg]:[stroke-width:1.25]',
+        inline: 'h-[20px] px-1.5 py-0 text-caption',
       },
       iconSize: {
         compact: 'size-6 p-0',
         'compact-fixed': 'size-[24px] p-0',
+        regular: 'size-7 p-0',
+        roomy: 'size-8 p-0',
+        touch: 'size-10 p-0',
+      },
+      shape: {
+        round: 'rounded-full',
       },
       iconPadding: {
         sm: 'p-1',
@@ -76,18 +83,31 @@ const buttonVariants = cva(
   }
 )
 
+type ButtonIconSize = NonNullable<VariantProps<typeof buttonVariants>['iconSize']>
+
+const responsiveIconSizes = {
+  compact: 'sm:size-6',
+  'compact-fixed': 'sm:size-[24px]',
+  regular: 'sm:size-7',
+  roomy: 'sm:size-8',
+  touch: 'sm:size-10',
+} as const satisfies Record<ButtonIconSize, string>
+
 export interface ButtonProps
   extends ButtonHTMLAttributes<HTMLButtonElement>,
-    VariantProps<typeof buttonVariants> {
+    Omit<VariantProps<typeof buttonVariants>, 'iconSize'> {
   /**
    * Square icon-action geometry without changing the selected size's typography,
    * corner radius, icon stroke or color. `compact` follows the spacing scale
    * (24px at the default root font size); `compact-fixed` stays at 24px.
-   * Both remove padding; an explicit iconPadding or className can override it.
+   * Regular, roomy and touch follow the spacing scale (28px, 32px and 40px
+   * at the default root font size). A responsive
+   * value changes geometry at the standard sm breakpoint. All remove padding;
+   * explicit iconPadding or className can override it.
    * Omit to retain the selected size's geometry.
    * @example <Button variant='ghost' iconSize='compact' aria-label='Remove'><X /></Button>
    */
-  iconSize?: VariantProps<typeof buttonVariants>['iconSize']
+  iconSize?: ButtonIconSize | { base: ButtonIconSize; sm?: ButtonIconSize } | null
   /**
    * Symmetric padding for icon actions whose content or layout determines their size.
    * Preserves the selected size's typography, corner radius and icon stroke.
@@ -98,11 +118,23 @@ export interface ButtonProps
 }
 
 const Button = forwardRef<HTMLButtonElement, ButtonProps>(
-  ({ className, variant, size, iconSize, iconPadding, ...props }, ref) => {
+  ({ className, variant, size, iconSize, iconPadding, shape, ...props }, ref) => {
+    const baseIconSize = typeof iconSize === 'object' ? iconSize?.base : iconSize
+    const smIconSize = typeof iconSize === 'object' ? iconSize?.sm : undefined
     return (
       <button
         ref={ref}
-        className={cn(buttonVariants({ variant, size, iconSize, iconPadding }), className)}
+        className={cn(
+          buttonVariants({
+            variant,
+            size,
+            iconSize: baseIconSize,
+            iconPadding,
+            shape,
+          }),
+          smIconSize && responsiveIconSizes[smIconSize],
+          className
+        )}
         {...props}
       />
     )
diff --git a/packages/emcn/src/components/composer-action-button/composer-action-button.tsx b/packages/emcn/src/components/composer-action-button/composer-action-button.tsx
index 0a466fc0544..d10a9e27b1b 100644
--- a/packages/emcn/src/components/composer-action-button/composer-action-button.tsx
+++ b/packages/emcn/src/components/composer-action-button/composer-action-button.tsx
@@ -27,7 +27,7 @@ export const composerActionButtonVariants = cva('rounded-full p-0', {
 })
 
 export interface ComposerActionButtonProps
-  extends Omit<ButtonProps, 'variant' | 'size' | 'iconPadding' | 'iconSize'> {
+  extends Omit<ButtonProps, 'variant' | 'size' | 'iconPadding' | 'iconSize' | 'shape'> {
   /** Accessible name for the caller's icon action. */
   'aria-label': string
   /** 28px by default; `sm` retains compact chat's 22px geometry and hover treatment. */