Hello, I was hoping you guys can help me on sizing for Suomy helmets. I was told they run 1 size smaller compared to US heads. I wear an XL Arai and XL Gmax. The helmet I want to buy to match my 80's perforated jacket is this helmet. The helmet is a size XXL. The seller also claims this brand runs small and an XL wearer should get an XXL for proper fitment. He does not offer returns or exchange. There are no bike shops in town that have Suomys laying around to try on. The helmet is 1/2 off dealer price and is brand new. Any thoughts?