Note: Helmets tend to run small. After measuring, manufacturer recommends ordering one size up.
Measure circumference of head and reference: Small (19"-20") Med.(21"-22") Large(23"-24") XL(25"-26")
MESH FOR DAVID CLARK
Ive been buying these Snoopy Helmets for many years to keep my headset on during aerobatics. I really like these mesh ones - they are cooler than the leather helmets, although perhaps not aesthetically. Get the Large.