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.
In 2016, the Complex magazine called John Elliott, the brand, the savior of the New York Fashion Week. This young high-end fashion brand supposedly saved the reputation of menswear brands, as they showed the direction of the next generation's menswear. Whichever piece you pick from their collection, they all will have something in common - great emphasis on comfort and cut, which are significant to the brand founder. Ever since John Elliott Co. creates womenswear apparel as well, their collections are considered small artworks.