I've made a concho from a German 1 Mark coin. The size is approximately 22mm. The screw size is M4. The screw length is approximately 4mm, but 8mm screws for thick leather are also included. Compatible with large jumper snaps. The photos are from previous items. Items will be shipped that are of the same quality. There may be differences in the year. If you would like to purchase multiple items, please check the stock beforehand via the question function. Multiple purchases will be shipped together. Thank you.