Face Form Finder
Glasses for Round Face: Size Chart With Real Frame Measurements
If you have a round face, start with frames that add structure. Below is a side-by-side size chart of rectangular and square frames pulled directly from brand product pages.
For a round face, reach for rectangular, square, or browline frames. These shapes add horizontal and vertical lines that balance softer cheek and jaw contours. Pick a frame whose total width sits slightly wider than the widest part of your face — not so narrow that it gets swallowed, not so wide that it slides. Before you buy, check the three measurements on every frame product page: lens width, bridge width, and temple length. Not sure you have a round face? Use the face shape detector to check your four image measurements.
Round-Face Frame Size Chart
Every row below was copied from a brand's own product page on 13 September 2026. Nothing is estimated or averaged. Every measurement can be traced to a brand official product page; where a US product page did not list a measurement, a non-US brand official page is cited in the CSV.
| Brand | Model | Frame Shape | Lens Width | Bridge Width | Temple Length | Scraped |
|---|---|---|---|---|---|---|
| Ray-Ban | RB5154 Clubmaster Optics | Square / Browline | 51 mm | 21 mm | 145 mm | 2026-09-13 |
| Ray-Ban | RB5228 | Square | 53 mm | 17 mm | 140 mm | 2026-09-13 |
| Ray-Ban | RB5375 | Square | 51 mm | 18 mm | 145 mm | 2026-09-13 |
| Persol | PO3189V | Rectangular D-frame | 53 mm | 18 mm | 145 mm | 2026-09-13 |
| Maui Jim | MJO2304 | Rectangular | 50 mm | 17 mm | 148 mm | 2026-09-13 |
Source notes: Ray-Ban RB5154 and RB5228 — all three measurements from the US product page. Ray-Ban RB5375 — lens width and bridge width from the US product page; temple length from the Switzerland brand official page (not listed on US page). Persol PO3189V — all three measurements from the Persol official product page (en-ae, variant 95, Black). Maui Jim MJO2304 — all three measurements from the US product page. See the CSV for full source URLs.
The same size chart is available as a CSV file so you can sort it, compare it against a frame you already own, or take it shopping.
How to Read the Three Numbers
Every pair of glasses has three key measurements printed or listed. Here is what each one means for a round face:
- Lens width — the horizontal width of one lens. For a round face, a wider lens (roughly 50–54 mm for most adults) adds the horizontal structure that softer contours lack.
- Bridge width — the distance between the two lenses. A narrower bridge can make frames sit higher and feel more balanced on fuller cheeks; a wider bridge sits lower. There is no single right number — it depends on your nose, not your face shape.
- Temple length — the length of the arm from hinge to ear bend. Most adult frames fall between 140–150 mm. Temple length matters for stability, not for whether a frame looks right on a round face.
Not sure how to measure your own face? See the face shape chart for how forehead, cheekbone, jaw, and face-length readings are taken.
Unit Conversion: Millimetres to Inches
Some brands list sizes in millimetres; others show inches. If you need to convert, use 1 inch = 25.4 millimetres. Below are worked examples using actual rows from the table above.
Example 1 — Ray-Ban RB5154 Clubmaster (lens width)
Convert 51 mm to inches:
→ 2.01 in (rounded to two decimals)
So the RB5154 lens width of 51 mm is roughly 2.01 inches.
Example 2 — Persol PO3189V (bridge width)
Convert 18 mm to inches:
→ 0.71 in (rounded to two decimals)
So the PO3189V bridge width of 18 mm is roughly 0.71 inches.
Example 3 — Maui Jim MJO2304 (temple length)
Convert 148 mm to inches:
→ 5.83 in (rounded to two decimals)
So the MJO2304 temple length of 148 mm is roughly 5.83 inches.
Going the other way — inches to millimetres — multiply by 25.4 instead of dividing.
What the Size Numbers Cannot Tell You
A rectangular shape and the right millimetres are a useful starting point. They do not guarantee comfort. Three things that the three-number size does not capture:
- Nose pads and bridge fit. Full cheeks or a low bridge can make a frame sit lower than the numbers suggest. Adjustable nose pads give you more room to fine-tune height and prevent slipping. A fixed saddle bridge is lighter but harder to adjust if your nose does not match the moulded shape.
- Temple pressure and grip. Temple length describes how long the arm is, not how tightly it curves behind your ear. A frame with the right millimetres can still feel too tight if the temples bow inward, or slide forward if they bow outward. Spring hinges help, but they are not a substitute for trying the frame on.
- Lens weight once glazed. A frame that feels light with demo lenses may feel noticeably heavier once your prescription is cut in. Higher prescriptions mean thicker and heavier lenses, which can shift how the frame sits on your nose and whether it slides.
Honesty note. This page gives you size numbers and shape direction for round faces. It is not a fitting guide and it cannot tell you whether a specific frame will feel good on your face. The only way to know is to put the frame on, wear it for at least ten minutes, and check for sliding, pressure marks, and comfort when you look down.
More Face-Shape Guides
If you found this page useful, you may also want to check:
- Face Shape Detector — upload a photo and see your four image measurements in the browser.
- Face Shape Chart — how seven shapes are read from forehead, cheekbone, jaw, and face-length readings.
- Different Face Shapes — an overview of each shape and what to look for.
- How to Find Your Face Shape — a step-by-step measurement method you can do at home.
- Haircuts for Face Shapes — if you are also thinking about a haircut to pair with new frames.
- Bangs for Round Face — how a fringe changes the visible outline of a round face.
- Haircuts for Round Face Men — short styles that control side bulk on a round face.