iStrap 20mm Genuine Leather Watch Strap Padded Contrast Tan Stitch Band Steel Butterfly Clasp Soft-Brown Made of genuine calf leahter, semi-gloss. The back side is nubuck, super soft Width: 20/18mm, fit watches with 20mm flat lug, comes with a 18mm steel tang buckle Length: 125/75mm,when fixed together, the total length range is 135mm to 180mm (5 5/16'' to 7''), plus the watch case diameter, and it's the wrist range the strap will fit Thickness: 4.5mm at lug end, tapers to 2.5mm at buckle end, light padded, super soft The strap is standard style, can fit most watches, can fit Breitling, Breguet, Cartier, Casio, Citizen, Longines, Nomos, Omega, Tissot and other watches with corresponding flat lug