It's about the size of a 4G backbore. There are some minor scratches from use, but overall it's a clean piece. The Hammond Design mouthpiece is a custom mouthpiece designed by American mouthpiece maker "Carl Hammond." He has created a unique lineup based on extensive data and experience gained from interacting with many players and creating mouthpieces to meet their individual needs. It is used by many players, including John Hagstrom, a trumpet player with the Chicago Symphony Orchestra. Size 11, Inner Rim Diameter 25.91mm, Cup L (Deep)