Get both the 1" and 3" Brittany bands and save.
The 1" band is perfect for around your ankles for glute training or thighs for abs. and only comes in one size
The 3" peach one is great for around your thighs to work your booty enjoy. This band comes in the 2 sizes sm-L if your thighs are over 27" per thigh then go with L smaller then go with SM.