We have 3 versions of this design. It is offered in a Large 1", a 1.5" XXL, and a 2.5" XXL. This is the 1.5" XXL.
The measurements given are the thickness of the material you are grabbing on to.
This XL size offers room for your whole hand to wrap around the handlebar. The 1.5" diameter easily allows your pointer finger to touch your thumb. Now you can Tarzan swing your way through roofs and dynos!