Chin-Chum has been one of our long-running best sellers. Roughly 1/2" in thickness. The semi-soft open-cell foam is covered with soft-to-touch velvet-like material for long-term comfort. A part of the chinrest is slipped into a pocket to prevent shifting, and a ultra heavy duty rubber band is guaranteed to last for many years of daily use.
Fits 4/4-3/4 violin, fits most side-mount chinrests well. For a large cup Kaufman or center mount chinrests, Large size might fit better.