N20 headgear sizing?

Just received an Resmed N20 nasal mask. I like it, but the head gear is almost too small. Does anyone know what size headgear the medium size mask ships with? Is there a way to measure to see what size it is?

My understanding is that the headgear is one size; only the mask changes.
I too am currently using a N20. I tried on a MED and a Large at my DME. Both sets of headgear were the same. And I currently have the all 4 ends of the strap extended all the way which remarkably fits by head perfectly. If the straps were longer, I'd likely still have them adjusted the same.

I know people have told me I had a big head, but I never realized they were speaking about the physical size.

Yeah, if you do have a large head, the N20 is NOT for you.

Cpap.com has different sizes of headgear. https://www.cpap.com/productpage/resmed ... dgear.html
They state on the nasal mask page under specs that it ships with the headgear standard size.