For Arai XD-4 Helmets, all cheek pads are interchangeable between the different helmet sizes. Remember, if you need more room in the helmet you need to order a smaller (thinner) cheek pad. To make a helmet tighter, you would need to buy a larger (thicker) cheek pad.
Replacement cheek pads for use with XD4 Helmets
Available in the following sizes: 12mm, 15mm, 20mm, 25mm, 30mm, 35mm