I have found these straps to be very comfortable and an excellent choice for Chopard ‘Mille Miglia’ models and other chronographs and sporty watches. They come in 5 sizes (18-20-22-24-26mm) and with 2 smooth, floating keepers. The straps themselves are black and have a nice tyre tread pattern on the top and are smooth on their under side, so they wear quite comfortably. Their length is 105mm on the buckle end (including the steel buckle) and 120mm on the tail end; so not short but not too long either. They taper by 2mm, so 18/16mm, 20/18mm, 22/20mm and so on. I have included many photos so you can get a better idea of what you are ordering.
I will include a pair of good quality spring bars with each strap. Feel free to contact me for whatever questions you might have.