Long time browser, first time buyer. I wanted to play it safe incase I did not end up liking the hat, so I ordered a Sale item. It fits very comfortably. Not sure about the “notch” part because all of the sunglasses Ive tested work just fine and do not ruin the hat fit, and also do not occupy the notch space. Maybe I just do not own a big enough pair of sunglasses.Either way, i will be reordering, my eye is on the ponytail hole style next!