Thanks for contacting us. I could confirm the issue. But in my opinion 22px is a better solution compared to 20px. This is a short video
showing the test with different heights. In Glow skin, which uses the same metrics as Silk, the line-height is 22px, but we missed to do the same for Silk.
Thanks once again for reporting the issue, this helps us to improve the controls and make them better. For the bug report your Telerik points have been updated.
All the best,
the Telerik team
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