Thank you for viewing. Trombone Mouthpiece WHF Franz Wintringer I purchased this new and used it for several years. The rim etc. should come off, but I hadn't taken it off for many years, so it won't come off. It will be shipped in a bag with bubble wrap. Please purchase if you understand that this is a used item. Rim Diameter: Approximately 3.6cm Inner diameter: Approximately 2.5cm Cup Inner depth: Approximately 2cm Shank Diameter: Approximately 1.1cm Overall diameter from rim to shank Approximately 8.5cm *I measured the sizes, but there may be some errors.