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.
FRED PERRY is a British clothing brand founded in 1952 by legendary tennis player Fred Perry. The brand is famous for its polo shirts, which feature a laurel wreath logo as a symbol of quality and style. The FRED PERRY brand has a rich heritage in tennis and streetwear and has been adopted by various subcultures and music scenes over the years. FRED PERRY combines sportswear and fashion to create timeless and classic pieces for both men and women.