Sorry to hear that. In our experience, the keyhole design fits almost everyone.
I'm glad that your wife is happy with these. If you like, or if anyone else is reading this, we can exchange for another pair of sunglasses. We currently have 3 different styles/shapes. Massdrop says final sale, but we're happy to exchange. Unfortunately we can't refund as that would have to go through Massdrop. Just email us at email@example.com