Mission Intake Helmet question

[Aussie Joe 0]

Hi all, Currently wearing a Medium NBH 4500 lid. It has a sizeable crack in the side and needs replacing ASAP. I have heard allot of good things about the Mission Intake helmet recently and I'm looking to pick one up.

Using the sizing chart on HockeyMonkey, my head (circ. 60cm or 23.62 inches) fits in between a MED and LRG sizes. Which one should I pick up? Is there room in the medium or should I be safe and pick up the large?

PS: I cannot try them on as the LHS doesn't have any other then small in stock.

[Invert 13]

I have a 58 cm head (7 1/4 hat size) and wear a Large intake with no adjustments. So my suggestion would be the Large since you have a larger head than me.