My LBS (er, LBM - it's just one guy plus his assistant) stocked helmets in three sizes: XL, M/L, and S/M. XL was way too big. S/M was way too small. M/L, although looking good, doesn't seem to fit right. Even with the thick pads, and the buckles tight, I could push it over my head.

He had one helmet of a different make which fit better. But I can still get it off my head, with a little work. I bought it anyway, because I needed something to get started. But, as you can understand, I'm not happy about it long term.

Can anyone help me out? I don't need a fancy or aerodynamic helmet - but I do want one that will provide protection. I'm not sure where I should turn next.