[ Tranquility ] Vacation Aviator Sunglasses

No tape measure? Use any debit or credit card. It's 85.6mm wide, the same everywhere.

1. Stand in front of a mirror and hold the card flat under your nose, one short edge in the middle of your nose.
2. Look where the other edge lands.
3. Ends at the middle of your eye → small face. Outer corner of your eye → medium. Past your eye → large.