We had this issue for the longest time...still do sometimes. The Starter socks at Walmart (with the grey or black elastic in the middle-fit the foot exactly so no bulking) work well for my son. Also, at Target they have these ankle socks with a yellow tripe at the toe. I can't remember the brand, but for some reason those have never bothered ds. We also buy those in bulk, and so do the grandparents!