standard or large?
Follow these 3 steps to determine the best size for you
Two-thirds of customers wear Standard
![](http://shopzygo.com/cdn/shop/files/Screen_Shot_2024-05-07_at_2.17.54_PM.png?v=1715087881&width=300)
Grab a tool to measure
If you don't have flexible measuring tape, use a charging cord and a ruler or stiff measuring tape.
![](http://shopzygo.com/cdn/shop/files/Back.jpg?v=1715087920&width=300)
Measure this distance
Tilt your head back and measure around the base of your skull, from the top of one ear to the other.
![](http://shopzygo.com/cdn/shop/files/Side_R.jpg?v=1715087945&width=300)
Choose your size
Below 28.5cm = Standard
Above 28.5cm = Large
If you're on the cusp, we suggest the Large.
![](http://shopzygo.com/cdn/shop/files/z2_b1a.jpg?v=1707873359&width=360)