This is a cork for a Hering mute. Sizes vary slightly depending on the era, so I will tell you the points to easily measure after purchase. Shipping will be done after you reply. I would like to send you one that is as close as possible in shape, so thank you for your understanding. Since it is handmade, the cut edges may be rough. Please be aware that there may be slight adjustments needed due to individual differences. The third photo is a picture of it attached to my Hering mute. For your reference.