Contact Research | CUH

Contact us – Enquiries and support | CUH

Governors | CUH

Board of directors | CUH

Pelvic health and obstetric physiotherapy | CUH

Small things, big difference | CUH

Winter | CUH

Imaging (Radiology) | CUH

Audiology - Clinic 10 | CUH

CUH | Cambridge University Hospitals | Addenbrookes, Rosie & Research

All interactive components on a page, such as buttons or fields, should ideally be large enough 
to be easily used by people with motor impairments. 

This ensures people with motor impairments can easily click or tap on the element.

The recommended size is 44 x 44 CSS pixels, with some exceptions:

* **Equivalent available** - the functionality provided by
  the control is available elsewhere, and large enough, on the same page.
* **Inline text** - the control appears inside a sentence or block of text. 
* **User Agent control** - the size of the target is determined by the user agent 
  and is not modified by the author. Generally this is not the case for web content.
* **Essential** - the size of the target is essential to the information being conveyed,
  e.g. a tutorial demonstrating what a small button looks like. This exception is rare.

## Applying this check

Nearly all websites will fail this check by default. The minimum size requirement
is larger than most links and controls on most websites.

This is the much stricter version of the WCAG 2.2 AA check for target size. Most websites
should focus on the AA check before considering this AAA check:

* [Target Size (Minimum)](https://w3c.github.io/wcag/understanding/target-size-minimum.html)

## Methodology

This check is run on both the mobile and desktop versions of every page. Results
for each may differ.

1. All interactive elements are identified, including buttons, links, and form controls. 
2. If an element is preceded or followed directly by a non-empty text node, the control
   is ignored.
3. If an element is not normally visible, it is ignored. This includes elements which 
   are positioned offscreen or cropped (e.g. for 'screen-reader only' text).
4. If an element is a link, and another visible link on the page points to the same URL, with 
   that other link meeting the size requirements, the element is ignored.
5. Otherwise, the element must have a minimum size of 44 x 44 CSS pixels.

## Troubleshooting

Silktide only records the first 100 instances of a failure on a page. Because failures
of this check are common, it is possible that your page has more than 100 failures, but
only the first 100 will be shown.

## Further reading

* [Target Size (Enhanced)](https://www.w3.org/WAI/WCAG22/Understanding/target-size-enhanced)

ensure-reasonable-target-size

September 2025

August 2025

Cambridge University Hospitals NHS Foundation Trust

	Title / URL	Issues
	Contact Research \| CUHwww.cuh.nhs.uk/our-research/our-researchers/	100
	Contact us – Enquiries and support \| CUHwww.cuh.nhs.uk/contact-us/contact-enquiries/	38
	Governors \| CUHwww.cuh.nhs.uk/about-us/governors/	36
	Board of directors \| CUHwww.cuh.nhs.uk/about-us/board-directors/	22
	Pelvic health and obstetric physiotherapy \| CUHwww.cuh.nhs.uk/clinics/pelvic-health/	11
	Small things, big difference \| CUHwww.cuh.nhs.uk/about-us/small-things-big-difference/	11
	Winter \| CUHwww.cuh.nhs.uk/about-us/winter/	10
	Imaging (Radiology) \| CUHwww.cuh.nhs.uk/our-services/imaging-radiology/	8
	Audiology - Clinic 10 \| CUHwww.cuh.nhs.uk/clinics/audiology-clinic-10/	7
	CUH \| Cambridge University Hospitals \| Addenbrookes, Rosie & Researchwww.cuh.nhs.uk/	7

Aim for large interactive controls

Cambridge University Hospitals NHS Foundation Trust

Where this issue has occurred