Size Guide



Grand Prix helmets come in all sizes from XS to XXL.



For helmet sizes the circumference of the head should be measured at 1 cm above eyebrows with a flexible tape measure as below:

Make sure that the helmet does not move horizontally and vertically once fit..
Ensure that the helmet does not impede on head movements.
Riders should not feel pressure points while wearing helmets.


In order to provide the slimmest helmet shapes possible, Grand Prix uses several shell sizes and EPS for its helmets as follows:

Open Face helmets (ref 2012OF)

Two shells, two EPS are used: a small shell and a small EPS for XS, S, M. A large shell and large EPS for L, XL, XXL sizes

Jet helmets (ref 2012J)

Two shells, two EPS are used: a small shell and a small EPS for XS, S, M. A large shell and large EPS for L, XL, XXL sizes

Full Face helmets (ref 2012FF):

One shell, two EPS are used: a unique shell and a small EPS for XS, S, M. Same shell and large EPS for L, XL, XXL sizes


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