Glasses Size Calculator
Enter your face width from temple to temple, your nose width and your pupillary distance if you know it. The calculator gives the frame size in the usual three-number form, such as 52-18-140, and compares the frame with your PD.
- Frame size
- Lens width
- Bridge and temple
Measure across your face at eye level from one temple to the other, in a mirror with a ruler.
Glasses are sized by three numbers printed inside the arm. They are lens width, bridge width and temple length, in millimetres. A face 132 mm wide with an average nose suits about 52-18-140. Frames within 2 mm of your size will usually fit.
Frame size chart
Average nose bridge. Search for a face width.
| Face (mm) | Frame size | Size |
|---|---|---|
| 118 | 45-18-135 | Small |
| 122 | 47-18-135 | Small |
| 126 | 49-18-140 | Small |
| 130 | 51-18-140 | Medium |
| 134 | 53-18-140 | Medium |
| 138 | 55-18-145 | Large |
| 142 | 57-18-145 | Large |
| 146 | 59-18-145 | Large |
Lens-bridge-temple.
Face width and frame
Average nose. Slide the face width.
The frame front shows the lens and bridge sizes.
How to find your glasses size
Face to frame. Step through it.
Face width
Temple to temple.
If you already own glasses that fit, the three numbers on the arm are your best guide.
Small, medium or large frames
Frame sizes. Compare them.
Narrow faces.
Most faces.
Wide faces.
Bigger lenses need more decentring if your PD is narrow, which can make lenses thicker.
Before you order
Frame checks. Tick each item.
Tick each item as you go.
Your eyes should sit near the centre of each lens, not near the edges.
What you get
Frame sizing. Each tile explains one result.
Width.
Width.
Length.
Match.
Class.
Frame width is roughly two lenses plus the bridge plus about 10 mm for the hinges.
Frequently Asked Questions
No question matches that search.
How do I know my glasses size?
Look inside the arm of glasses that fit you for three numbers, such as fifty-two, eighteen, one hundred and forty.
What do the numbers on glasses mean?
Lens width, bridge width and temple arm length, in millimetres.
How do I measure my face for glasses?
Measure from temple to temple across your eyes.
What is a medium frame size?
A lens width of about fifty-one to fifty-four millimetres.
What is PD?
Pupillary distance, the space between the centres of your pupils.
Does bridge size matter?
Yes. Too narrow pinches, too wide lets the frame slide down.
What temple length do I need?
Usually one hundred and forty millimetres, or one hundred and forty-five for larger heads.
Frames that fit your face
Know your three numbers and shop with confidence, in store or online.
More size calculators
Each one has its own calculator, worked examples and answers to common questions.