RE: CFC - Changes to Target Size for Issue 631

Choice number 4 from the call yesterday seems to cover exactly that what is missing in Apple’s HIG and Google Material Design and the reason we tried to adjust the SC.

Number 4 was: 44x44 except text links at AA

From: Repsher, Stephen J []
Sent: woensdag 10 januari 2018 23:09
To: Andrew Kirkpatrick <>; WCAG <>
Subject: RE: CFC - Changes to Target Size for Issue 631

I’m all for compromise, but this CFC has landed on math that is completely illogical and I cannot live with it.

The impetus was that most targets would likely have a height of at least the default text size of 16px (which I completely disagree with but let’s run with it).  So we’re saying that a pass is given to a target with dimensions of 44 x 16px, which has a target area of 704 square pixels and a maximum length along the diagonal of about 47px.

However, a target with dimensions of 34 x 34px would fail even though it has 64% more area for the user to hit (1,156 square pixels) and a slightly longer diagonal of over 48px.  Asking anyone to swallow such an illogical criterion does not make any sense and certainly shouldn’t be in a candidate W3C recommendation.

The only way this is going to work is to go back to a square target area that we can defend, and come up with exceptions that everyone can live with.


From: Andrew Kirkpatrick []
Sent: Wednesday, January 10, 2018 1:55 PM
To: WCAG <<>>
Subject: CFC - Changes to Target Size for Issue 631
Importance: High

Call For Consensus — ends January 12 at 1:45pm Boston time.

The Working Group has discussed a change to the Target Size SC in response to issue 631 ( and discussion. This was discussed on the call (

The specific changes are detailed in this pull request:  (see implemented at

If you have concerns about this proposed consensus position that have not been discussed already and feel that those concerns result in you “not being able to live with” this decision, please let the group know before the CfC deadline.


Andrew Kirkpatrick
Group Product Manager, Accessibility

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Received on Thursday, 11 January 2018 07:31:07 UTC