Don't even try to measure your insole, you'll never get it right. Just look at the measurements on any of your sneakers in CM or CHN. Then take that information and find the corresponding US size in the size guide. For example, the insole length of 25 CM corresponds to US 7 in Vans. You may get a different US size with a different brand due to slightly different measuring.
Le Coq Sportif is a French brand producing sports equipment such as shoes, shorts, and T-shirts. The brand was founded in 1882, and its name is inspired by a cock, the national symbol of France. The founder, Emile Camuset was a great lover of sports and thus began producing jerseys in his small workshop. Le Coq Sportif is now one of the most prestigious brands producing sports products, and it cooperates with many European football clubs or directly with athletes.