It is one size and have enough length(2300mm) to compatible with the tire of 12" 16" 18" 20" 24" 26" 27.5" 29".
The tire liner can be used as protective layer between the outer tire and inner tube, very easy to install.
Easy to install, just measure and trim it, you can stop the thorns, glass, thorns, nails and other trail debris from penetrating through and puncturing the tube.
This protector is made by high quality of Polyurethane, light weight and durable.
When a thorn or piece of glass attempts to penetrate, it comes up against a surface which is both hard and elastic.
The tire liner will have excellent performance on protection, reduce the truble of tube repairing.

Spec
Color: Green
Material: Polyurethane
Item size: 2300x34x1mm
Item weight: 92g per piece
Packing quantity: 2 pcs. It's eough for two wheels.
Packing: Blister Packing