I've made a concho from a British 10 pence coin. The size is approximately 28mm. The screw size is M4, with a length of about 5mm. I'll also include longer 8mm screws. Please use these on thick leather. Compatible with large jumper snaps. The photos are from a previous item, and the product shipped will be of similar quality. There may be differences in the year on the coin. Shipping will be via Yu-packet Post Mini. Thank you. If you need multiple pieces, please check the stock beforehand. Shipping costs will be discounted for the second item onwards. I will relist as a multiple-item set. #Leathercraft