I bought this watchband to replace the band on a Mercedes-branded Tourneau chronometer I had bought years ago.  The new band fit perfectly, and was an exact match for the original.  This band arrives long, with enough material to encircle a giant's wrist.  My wrist is about 10" in circumference, and I had to cut of at least an inch of material (and maybe more), so it is likely to fit any wrist.  The material is cut with a razor blade, so there is no special tool required.