I take it back about Knight corp socks, Ive had several issues with the socks not fitting into my material columns and after 3 failed attempts to make it rite, I was unable to continue to waste my time and try to get the rite sizes from them. I did however order 100 socks from bizzybee and I must say that their socks are stronger then most ive tried and they fit very very well into all the precision, ETS and of course bizzybee material columns in my lab, sure they are $20 each but ya get what you pay for!