Size Guide | NACA Comet Equestrian Helmet

There are two shell sizes available, with six interchangeable foam liners to ensure a perfect fit for head sizes from 54 cm to 59 cm.

By replacing the inner foam according to the table above, the helmet size can be adjusted within the shell’s range.

Choosing the right size is easy — and essential for your safety. A helmet that's too big or too small won’t protect you properly and will be uncomfortable.

To measure your head size:

1. Stand in front of a mirror to ensure an accurate measurement.
2. Place a tape measure around your head, just above the ears and eyebrows, at the forehead and around the largest part of the back of your head.
3. Bring the ends of the tape together, ensuring a snug fit.
4. Read the measurement in centimeters — this will help you choose your size. This model runs slightly large; if you're between sizes, we recommend selecting the smaller one.

If you don’t have a soft tape measure, you can use a string and follow the same steps. Then lay the string flat and measure its length to determine your head circumference.