Ergon GP1 BioKork Bicycle Handle Bar Grips (Cork Brown - Large - Performance 132mm) Ergon's extensive grip assortment is now presented with completely re-worked and re-invented packaging. This uses as little material as possible to and much of the material used is recycled Sizing is measured around the circumference of the hand at the palm: Small = 6.5-8.5 size hands Large = 8.5-10.5 size hands *Grip shape may be slightly different between the two sizes Ergon does not recommend using any bar end grip models on any carbon fiber handlebars