People who often buy Converse know that their shoes are one size larger than normal counter shoes. Your 250cm is wrong, because the size is about 39-40. You can look at the number written on the sole of the shoe. If it is 3 and 1/2, it is size 36.

Also~ share my online shopping experience~ When buying shoes online, you must read the purchase reviews and product introductions (mainly whether the size is standard and whether it is too large or too small). Only after inquiry can you make a foolproof purchase~