Sliding Clamp Security Clasp Watch Bracelet Strap 7mm to 22mm Gold and Silver Sliding Clamp Opening Clasps for Watch Bracelet Ladies & GentsStainless Steel (SS) & Gold Plated (GP) Sizes 10mm and under are supplied without clamps (being smaller they can be locked with a single lock) Sizes: 7, 8, 9, 10, 11, 12, 14, 15, 16, 18, 20, 22 mm Measure the strap / bracelet at the end furthest from the watch and order that size.Use a calliper or steel rule / tape to measure, do not use a plastic ruler they are not accurate enough.If the measurements are in between ie: 15.7mm order 16mm Choose size and colour from the drop down menu Post is via Royal Mail and International Purchases will be via Ebay's Global Shipping Service.Post is same or next day depending on the time of the order. Thank You !KEEP ON TICKING !!