Basically, any helmet in a reputable store will meet the same certification standard(s), so they all should provide the same level of protection. Comfort is important, and most helmets are adjustable over a fairly wide range.

One important variable is color. I would not recommend a dark color. Based on my riding, and from observations from behind the wheel while driving, a bright or white color makes the rider much more conspicuous, while a black helmet obscures your presence. I like red a lot, but it fades to black in reduced visibility.

So flaunt the color of purity when you ride. It fits, right??