What is the WCAG 2.2 minimum target size?

Success Criterion 2.5.8 Target Size (Minimum), Level AA: the target for pointer input must be at least 24 by 24 CSS pixels, unless an exception applies — spacing, an equivalent control on the same page, inline text, a user-agent control that the author has not changed, or an essential presentation.

How does the 2.5.8 spacing exception work?

Centre a 24 CSS px diameter circle on the bounding box of each undersized target. The target passes if its circle does not intersect another target or the circle of another undersized target. For a row of equal small icons that means at least 24 px from centre to centre: a 16 px icon needs an 8 px gap, a 20 px icon a 4 px gap. Next to a large target, the gap only needs to be 12 px minus half the icon size.

What is the difference between 2.5.8 and 2.5.5?

2.5.8 is Level AA (24 × 24 CSS px, with a spacing exception) and is required for WCAG 2.2 AA conformance. 2.5.5 Target Size (Enhanced) is Level AAA and asks for 44 × 44 CSS px, with no spacing exception.

What touch target size do Apple and Android recommend?

Apple's Human Interface Guidelines list a default control size of 44 × 44 pt on iOS, iPadOS and watchOS with a minimum of 28 × 28 pt (macOS 28 pt default / 20 pt minimum, visionOS 60 / 28 pt, tvOS 66 / 56 pt). Android's accessibility guidance recommends a touch target of at least 48 × 48 dp.

Are CSS px, iOS pt and Android dp the same size?

They are all density-independent units. On most phones the browser's device pixel ratio matches the system scale factor, so 44 CSS px is about the same size as 44 pt or 44 dp on that phone. Device pixels = units × scale factor (2× or 3× on most phones). On Android, px = dp × dpi ÷ 160, so 48 dp is 0.3 in (7.62 mm) at the nominal density. Note that the CSS pt unit (1/72 in) is not an iOS point.

Does padding count toward the target size?

Yes, if the padding is part of the clickable element. A 24 px icon inside a button with 10 px padding on each side has a 44 × 44 px target. Margin outside the element does not count toward size, but it does count as spacing for the 2.5.8 exception.

Touch Target Size Checker

Enter a target's width, height and the gap to its nearest neighbour. See whether it passes WCAG 2.5.8 (24×24 CSS px, or the spacing exception), WCAG 2.5.5 (44×44), Apple HIG (44 pt) and Material (48 dp), and convert px, pt, dp and mm.

WCAG 2.2 Success Criterion 2.5.8 Target Size (Minimum), Level AA, requires pointer targets of at least 24 × 24 CSS pixels.

Target Dimensions

Width

Height

Unit

px (CSS) dp (Android) pt (iOS)

Spacing to the nearest target (WCAG 2.5.8 exception)

Gap, edge to edge

Neighbour is

Neighbour size

Device (for physical size)

Preset

Scale (device px per unit)

Screen density (ppi)

Quick presets

Compliance Results

Visual Size Preview

Blue dashed = 44 reference · grey circle = 24 px circle · coloured box = your target

px, pt, dp and mm converter

Uses the scale factor and density set above. CSS px, iOS pt and Android dp are treated as one logical unit; device px = unit × scale; inches = device px ÷ ppi.

Value

From

—
CSS px = pt = dp: —
device pixels: —
millimetres: —
inches

Touch target size requirements

Guideline	Size	Notes
WCAG 2.2 SC 2.5.8 Target Size (Minimum), AA	24 × 24 CSS px	Smaller passes if its 24 px circle does not intersect another target or another undersized target's circle; also exempt: equivalent control, inline text, unmodified browser control, essential.
WCAG 2.2 SC 2.5.5 Target Size (Enhanced), AAA	44 × 44 CSS px	Exceptions: equivalent 44 px control, inline text, unmodified browser control, essential. No spacing exception.
Apple HIG — iOS, iPadOS, watchOS	44 × 44 pt (min 28 × 28)	Default control size; Apple suggests about 12 pt padding around bezelled controls and 24 pt around unbezelled ones.
Apple HIG — macOS / visionOS / tvOS	28 / 60 / 66 pt	Minimums 20, 28 and 56 pt.
Android accessibility (Material)	48 × 48 dp	px = dp × dpi ÷ 160 (1 dp = 1 px at 160 dpi).

Sources: W3C Understanding 2.5.8 and 2.5.5; Apple HIG Accessibility; Android Make apps more accessible and screen densities. In CSS, 1in = 96px and 1pt = 1/72in as absolute units; the physical size of a CSS px on a phone depends on the device.

Quick answer

WCAG 2.2 Success Criterion 2.5.8 Target Size (Minimum), Level AA, requires pointer targets of at least 24 × 24 CSS pixels. A smaller target still passes if a 24 px diameter circle centred on it does not overlap any other target or the circle of another undersized target, which means about 24 px centre to centre between small targets. The AAA criterion 2.5.5 asks for 44 × 44 CSS pixels. Apple's HIG uses 44 × 44 pt as the default control size on iOS (28 × 28 pt minimum), and Android recommends at least 48 × 48 dp. Inline links in text and browser-default controls are exempt.

Examples

Target	WCAG 2.5.8 (AA)	WCAG 2.5.5 (AAA)	Apple 44 pt / Android 48 dp
24 × 24 px	Pass (size)	Fail	Fail / Fail
20 × 20 px, 4 px gap, small neighbours	Pass (24 px centre to centre)	Fail	Fail / Fail
20 × 20 px, 2 px gap, small neighbours	Fail (needs 4 px gap)	Fail	Fail / Fail
44 × 44 px	Pass	Pass	Pass / Fail
48 × 48 px	Pass	Pass	Pass / Pass

Enter your target size and spacing to check every standard at once.

Summary

How it works

Enter the width and height of the clickable area (include padding that is part of the button) and pick px, dp or pt.
Enter the edge-to-edge gap to the nearest other target, whether it sits beside or above/below, and whether that neighbour is also smaller than 24 px.
Read pass or fail for WCAG 2.5.8 (AA), WCAG 2.5.5 (AAA), Apple HIG and Android/Material, plus the extra width, height or gap needed.
Set the device scale factor and screen density to see the physical size in mm.
Use the unit converter to turn px, pt, dp, device pixels, mm or inches into each other.

Use cases

Checking icon buttons, close buttons and pagination links for a WCAG 2.2 AA audit.
Working out how much spacing small toolbar icons need to pass the 2.5.8 spacing exception.
Comparing a web design against Apple HIG and Android touch target guidance.
Converting a 48 dp or 44 pt target into millimetres for a given phone density.
Writing evidence for an accessibility conformance report.

Frequently Asked Questions

Last updated: 2026-10-10 · Reviewed by Nham Vu