Agreeing that it is useful to allow calc. I suspect it was not intentionally disallowed - some of the text in CSS3 Fonts dates to CSS 2.0 and NUMBER was probably just copied over. It should, as you say, be `<integer>` -- GitHub Notification of comment by svgeesus Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/1127#issuecomment-289817990 using your GitHub accountReceived on Tuesday, 28 March 2017 16:00:26 UTC
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