Website size chart is incorrect. I ordered a size small based on the online product sizing chart for my daughter’s 6.5 women’s shoe size. When the item arrived the sock package said size small is youth size only. Women’s size 5-10 is a size medium. Now the sock size needed is sold out. I contacted customer service for a resolution, which was a return only due to the size needed being sold out, and was told I should check the size on the packaging before I make my purchase. Which is impossible because how do I check the packaging when I don’t have a physical product till I make an order and it is delivered. The product itself seems to be well made and has good cushioning. Just make sure to get the correct size. Unfortunately we won’t know how it performs or fits as it is being returned.