Never having bought these leggings what size to purchase as I am long waisted and round. So I bought 2 sizes - FireFit 3x and the WaterFit2x. I tried on the FireFit first. It was comfortable, however, it was too large - noticed this after wearing them for several hours. Gifted them to a friend. Next I put on the AirFit 2x. These fit well and are so comfortable. They are made well and offer some compression. Will I order more? Yes!