“I ordered a medium slim fit and it was a little too loose. Even though I used the measurement online exactly how it suggests. The customer service department was beyond helpful and responsive. Even though I had just past my return window they allowed an exchange. I was very pleased with my purchase experience , custom service and ultimately the exchanged item I received. The band is great. Stays in place and is very comfortable, even while working out. I ended up sizing down from a medium to an extra small. If you like a more snug fit I’d suggest the same.”