PUNCH GUIDES

Sunglasses Size Guide: Find Your Perfect Fit

Find your perfect sunglasses size with our easy fit guide. Learn frame-to-frame vs hinge-to-hinge measurements, how to read temple numbers, and choose the best style for your face shape.

Quick guide to using this calculator ▾

Choose your brand method. Pick WMP Eyewear for hinge-to-hinge, or Other Brands for frame-to-frame.
Measure the width in mm. Use the width diagram if needed.
Enter your number and tap Find my size.
If you only have temple print numbers, use your lens+bridge estimate and select the acetate/metal option for WMP.

Still unsure? Check the guides below or contact us and we’ll help you size up fast.

WMP Eyewear uses Hinge-to-Hinge (inner hinge to inner hinge).

Size Estimator

Your measured width (mm)

Only if estimating from printed numbers

If you measured hinge-to-hinge directly, ignore this. If you used Lens + Lens + Bridge, this adjusts to true hinge-to-hinge width.

Measurement Diagrams

View measurement diagrams ▾

Hinge-to-Hinge width (WMP Eyewear)

WMP guidance: ideal fit is usually within about 4mm of your hinge-to-hinge measurement.

How to Adjust Your Sunglasses

Fix slipping, nose pressure or ear pinch with simple at-home tweaks.

Read guide

Face Shape Guide

Find shapes that flatter you - Aviator, Square, Hexagonal and more.

Read guide

What’s the difference between hinge-to-hinge and frame-to-frame? ▾

Hinge-to-hinge measures the width inside the front of the frame - from one inner hinge to the other.

Frame-to-frame measures the width outside the frame - outer edge to outer edge across the front.

WMP Eyewear uses hinge-to-hinge. MessyWeekend, A.Kjærbede and Truevivid use frame-to-frame.

Rule of thumb: frame-to-frame usually reads ~3–5mm wider than hinge-to-hinge on the same pair.

Where do I find the size numbers on my sunglasses? ▾

Look on the inside of one temple arm. You’ll see something like:

52 ▢ 18 - 145

52 = Lens width (mm)
18 = Bridge width (mm)
145 = Temple length (mm)

Printed numbers help estimate width, but exact fit varies by rim thickness and hinge placement.

I love my sunglasses but they’re too big and keep slipping. Can I adjust them? ▾

Yes - if your frames are acetate, you can usually adjust them at home. Dip only the temple tips (the part behind your ears) into warm, not boiling water for 30 - 60 seconds, then gently bend the ends inward so they hug your ears more securely.

Do not heat-bend polycarbonate or metal frames, as they can snap or warp. If unsure, an optician can adjust them for you or you can add silicone grip pads.

Visit the full adjustment guide.

Important: If sunglasses are adjusted away from the manufacturer’s standard design template, they are no longer returnable. Guidance only - PUNCH accepts no liability for damage or injury caused by at-home adjustments.

Why do my sunglasses leave marks on my nose? ▾

Marks usually mean the frame is too tight on the bridge or nose pads are pressing down. Try a slightly wider frame next time, add stick-on silicone nose pads for cushioning, or ask an optician to adjust the nose pads if your frames have them.

My sunglasses slide down when I look down - what can I do? ▾

Sliding usually means the frame is a bit wide. If they’re acetate, warm the temple tips in warm water for 30–60 seconds and bend them slightly inward. Silicone nose pads can help too, and an optician can tighten the temples in minutes.

How can I stop sunglasses from pinching behind my ears? ▾

Pinching happens when the temple curve is too sharp or the frame is slightly small. If acetate, warm the temple ends and bend them outward a touch. Otherwise, have an optician reshape them safely. If it happens often, consider a larger width band.