Love how they sit? Find your next pair the same size.

Take a pair of glasses you already get on well with and look on the inside of one of the arms (the part that rests over your ear). You'll usually see something like 52 □ 18 · 140 printed small.

The first number is the lens width, the second (after the little square) is the bridge between the lenses, and the last is the arm length. Enter each one above — they're all in millimetres.