I followed the sizing guidelines, but was disappointed when the product arrived and it was too large. I tried to use it in a tennis match, but it would not remain in place. It was too loose and did not provide much compression or support. Since Id worn the product, I assumed it could not be returned. So, I ended up with a product that I cant use. Sometimes, its better to try things like this on in a physical store rather than buying it online. That way, you can see immediately if the product provides a good fit. Other than size, the product appeared to be made well. But, if it doesnt fit, it doesnt work.