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Your fit

Any one of these is enough. Saved on this device only; nothing is sent to us.

1 · Your PD most accurate

On your prescription as PD. How to measure it.

2 · A pair that fits you

Printed inside the arm, like 52□18 145.

3 · Or just your face width

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or

We use this only to sort stores by distance. It stays on this device.

Three numbers decide the fit.

Designer frames are often made in one or two sizes, and the brands publish them. Know your numbers and you can rule frames in or out before you leave home.

Woman in tortoiseshell glasses and a white roll-neck in a bright glass-walled space

Reading the numbers on a frame

MODEL 042352□18 145C.2 · ITALY

52 is the lens width: the widest point of one lens, in millimetres. 18 is the bridge: the gap between the lenses over your nose. 145 is the temple length, hinge to tip. Most adult frames run 46 to 56 for the lens, 15 to 22 for the bridge and 135 to 150 for the temple.

A difference of 2 mm in lens width is noticeable on the face; 4 mm is a different size. Bridge is the least forgiving number, because it decides where the frame sits on your nose.

Your PD

Pupillary distance is the space between the centres of your pupils. It is usually on your glasses prescription as PD, sometimes as two numbers (one per eye, like 31.5/32). Adults typically measure 54 to 74 mm.

No prescription handy? Stand 20 cm from a mirror, hold a millimetre ruler against your brow, close your right eye and line the zero up with the centre of your left pupil. Open your right eye, close the left, and read the number at the centre of your right pupil. Do it three times and take the middle reading. An optician will measure it properly at your fitting.

How airqip scores a frame

With your PD, we compare it with the distance between the two lens centres (lens width plus bridge). Your eyes should sit at or just inside the middle of each lens. Too wide and lenses get thicker at the edges and the frame looks big; too narrow and you look through the outer edge.

With a pair that fits, we compare the overall width, the bridge and the temple. With only a face width, we compare against a typical frame for that width, more loosely. Frames made in several sizes are scored on whichever size suits you best. Made-to-order frames, like most LINDBERG, are built to your measurements.

This is a guide, not a fitting. Face shape, nose shape and prescription all matter, which is why the last step is always trying them on.