This is a euphonium case by Ritter. I purchased it used and have never used it since. I believe there are no noticeable scratches, but please understand that it is a used item. Bell size: 30cm A YAMAHA YEP-621S fits perfectly. There is no dedicated pocket for a mouthpiece, but there are two pockets that seem suitable for small items. Also, there is a pocket on the back that seems suitable for storing sheet music.