I know which are mine, but DH and DSs 1, 2 & 3 all have similarly-sized feet. After washing all the socks I struggle to work out which are whose. I can't spread them all out & say "pick out your own" because DS1 is acquisitive, DH proprietal & DS2 is autistic (& would end up with none). As for DS3, he'd just get bolshy if DS1 got there first. Thank goodness DS4's feet are significantly smaller AS YET! So, how do you manage?