The sizing chart for this helmet shows a large is 57-59 cm. BUT on Giro website a large for the fuse is 59-62.5 cm. What is correct?

Tech Specs:

Material:

[Shell] polycarbonate; [Liner] polystryene 

Ventilation:

16 Super Cool vents, Thermostat adjustment, Weatherstrip vent plugs 

Adjustability:

Chin strap 

Weight:

Not specified 

Recommended Use:

Skiing, snowboarding 

Manufacturer Warranty:

1 Year 

Country of Origin:

China