I have found that we all have different shaped heads and each helmet brand is a different shape. I'd say try on different brands. I used to wear Giro but when I tried on a Bell I found it really fit the shape of my head (no, not pointy ). I hadn't realized the Giro really didn't fit me too well till I tried the Bell Furio.

Most brands have an adjustment on the back so you can really get a custom fit.

Happy shopping!