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.
Sixth June is a French brand that introduces an uncoventional style to the market. It is a dynamicly developing brand that promotes the individual everyday style of their customers. The goal of this brand is to offer shoes that have a perfect fit, are comfortable a fullfil demands of their customer. The satisfaction guarantee for each of their customers are modern technologies, high-quality materials, imaginative colours and constant perfectioning of their cuts.