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.
Selected is a sister brand to the Nordic fashion giant Bestseller. Its product line is divided by sex, into Homme and Femme, but premium quality pieces with minimalist design are in both categories. During the manufacturing process at Selected, the emphasis is put on natural connection of contemporary trends with Scandinavian tradition.