It's so nice for a product to live up to the reviews and company's guarantee.  I've bought Darn Tough socks in the past, and I still have every pair.  They last forever!  If I'm not wearing them while hiking in the swamp and in the woods near our home, I walk around with them on in the house with no shoes. Plus they're so cute!  And unlike other socks, they keep my feet warm and dry without that yukky clammy feeling.  I wear a size 9 women's shoe with a tendency to be wide, and the medium fits perfectly.  Highly recommended.