We have had tears for years about getting socks on and these are the first socks my son LOVES.  I was about to go spend $8.99 a pair for seamless socks from Fun and Function but decided to try these first since they are so much cheaper.  They have solved our problems!  No bumps and totally smooth on the inside.  I put them on and they are sooooo soft and comfy.  SIZING:  My son wears size 3 shoe.  We ordered size 8-9 in this sock and it is a great fit for him.  I wear size 8 women's shoe and it stretches and fits me pretty well too, though I would order the 9-11 if I were ordering for me.