[css-backgrounds] Specify exact pixel values for border-width: thin, medium, thick · Issue #7254 · w3c/csswg-drafts (original) (raw)

See this Twitter thread: https://twitter.com/tabatkins/status/1522261879762014223

Since browsers agree on 1px, 3px and 5px for border-width: thin, medium, and thick, respectively, it seems to me the spec could require this mapping for all UAs.

cc @tabatkins @bfgeek