The variation in shape of grips occurs when they are designed to provide increased comfort. The grip has a wing to provide support for your hand and wirist to be more in an ergonomic position. This can be important if spending time on your bike or you suffer from arm elbow, neck and back discomfort
Winged shape grip
Standard shape grip
Adult grips are usually 130 to 140mm long with a diameter range between 27 – 35mm.
Getting the right size grip is usually about matching up your hand size to a length and diameter so that the grip will fit the natural shape of your hand. So it’s better for people with smaller hands – women – to get a shorter length and small diameter.
There are other things that influence this fit. The most obvious is whether you wear gloves or not and how well padded the gloves are. Also some people have a preference for feel through their hands so will sacrifice a padded feel – bigger diameter – for a slim grip.