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.
Thrasher was originally the bible of all skaters, then a production company and a radio station, now also a clothing brand. T-shirts, sweatshirts, tracksuits, caps, snapbacks and much more, all with the Thrasher logo. No matter whether you skate or not, you'll love their clothes.