Try frames on.
Pick the shape closest to your face, then try each style in four colors. The matches are rules of thumb: the right frame is the one you like wearing.
Rectangle, black
The three numbers on the arm.
Look inside the arm of the glasses you have now. Three numbers, in millimeters, tell you the size. Bring them in and we’ll start from frames that fit the same way.
- 52: lens width
- How wide each lens is. Most adults wear 50 to 56.
- 18: bridge
- The gap between the lenses, where the frame sits on your nose.
- 140: arm length
- From the hinge to the tip behind the ear.
Then try the real ones.
An optician measures where your pupils sit, checks the bridge and the arms, and adjusts the frame to your face when the lenses come in. Bring your prescription if it’s from somewhere else.
Book a frame fitting