These were exactly what I was looking for! I had been looking for something to wear inside my Toms without any sock peeking through and not only did these do that, I didn't even remember I was wearing them til I took my shoes off. They are low cut on the sides so they can barely be seen in flats. I wear an 8 1/2 and the M/L fit perfectly. They also didn't bunch inside my shoe like some other liners because of the silicon heel pad. I will be buying them in black also!