While changing my signature, I was met with this

It's nice that it shows the current height of the signature, so why not add the width as well?
Fair warning: that hasn't been accurate in the almost 11 years I've been here.

Unfortunately there was a legitimate reason for this. Due to some CSS quirks, the width could not be accurately calculated for all signatures, so it was removed. I never managed to come up with a workaround for this, and it was a low priority issue so the bug report has been open for a while: ! Forum signature preview glitches
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