kind of a confusing question. lets say a 10.5 in gl3s for me is a good fit but when i walk theres a little heel slippage, like if i wear no show socks they kinda slip off. im considering buying a 10 in these gl3s but unsure if it might be too small. would wearing 2 socks and trying my 10.5 on = to a sz10 in a way? as in if the 2 socks makes the shoe fit better and theres no slippage a sz10 should be okay right? found a grail but never owned a sz10 lol and dont have time to drive to a store kinda far away