What's the standard size for sunglasses?

The most common size is 52-18-140 for unisex / standard fit. Women's smaller frames run 48-15-135 to 50-17-140. Men's larger frames run 54-19-145 to 58-20-150. Oversized statement frames go to 60-22-150 or larger.

What is the bridge in sunglasses?

The bridge is the part between the two lenses that sits on your nose. The bridge measurement is the distance from the inner edge of one lens to the inner edge of the other lens. A narrow nose bridge (12–16mm) on glasses fits a narrower nose; wider bridge (18–22mm) accommodates wider noses.

What is temple length on glasses?

Temple length is the arm of the glasses, from the hinge near the lens to the tip behind the ear. Typically 130–150mm. Too short = arms curl forward and frames slip. Too long = arms extend past the ear and frames float. ±5mm of your usual is comfortable.

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Size charts May 7, 2026 7 min read

Sunglasses Size Chart: Lens, Bridge, and Temple Sizing Decoded

Q: How are sunglasses sized?

By three numbers stamped on the temple: lens width, bridge width, temple length, in millimeters. A 52-18-140 frame has a 52mm lens, 18mm bridge, and 140mm temple. Most adult sunglasses fall between 48-16-130 (small) and 58-22-150 (large).

Q: What size sunglasses do I wear?

Match the total frame width (lens × 2 + bridge) to your face width within ±5mm. Adult women's faces typically measure 128–140mm; adult men's 138–150mm. A 52-18 frame is roughly 122mm wide — fits a 125–130mm face well.

Q: Are sunglasses sized like prescription glasses?

Yes. Both use lens-bridge-temple notation. Many people wear the same numbers in both. Sunglasses tend to run slightly larger lenses for sun coverage; prescription tends to run slightly smaller. The same numbers fit the same way on the face.

Three numbers, all in millimeters. Lens width, bridge width, temple length. The 52-18-140 stamp on every pair of glasses you own. Here's the full chart for picking sunglasses by face width.

Quick answers

What do the numbers mean?: Lens width – bridge – temple, in mm
What is 52-18-140?: 52mm lens, 18mm bridge, 140mm arm
Small frame lens width: ≈ 48–51 mm
Medium frame lens width: ≈ 52–54 mm
Large frame lens width: ≈ 55–58 mm
Where is the size printed?: Inside the temple arm or bridge

The Three Numbers Decoded

Position	Means	Typical range
First (e.g., 52)	Lens width — horizontal width of one lens	44mm small – 60mm large
Second (e.g., 18)	Bridge width — gap between lenses	13mm narrow – 22mm wide
Third (e.g., 140)	Temple length — arm length	120mm short – 155mm long

Total frame width (the visible width on your face) ≈ lens × 2 + bridge. A 52-18 frame is approximately 122mm wide, plus 2–4mm for frame edges = ~125mm visible width.

Sunglasses Size by Face Width

Face width (temple-to-temple)	Recommended frame width	Common sizes
≤125mm (petite)	120–127mm	48-16-135, 49-17-140
125–130mm	125–132mm	50-17-140, 51-18-140
130–135mm	128–137mm	52-18-140 (standard women's)
135–140mm	133–142mm	53-18-140, 54-19-140
140–145mm	138–147mm	54-18-145, 55-19-145
145–150mm	143–152mm	56-19-145, 57-20-150 (standard men's)
150mm+	150mm+	58-20-150, 60-22-150 (oversize)

Match the frame's total width within ±5mm of your face width. Statement oversize sunglasses can be +5 to +10mm wider than face for fashion intent. More than +20mm and they look ill-fitting rather than oversized.

Standard Sizes by Style

Aviator

Classic: 58-14-135. Mid-sized: 55-14-135. Modern Ray-Ban Aviator runs 55-58mm. Bridge is narrow because aviators sit close to the eyes.

Wayfarer

Original Wayfarer: 50-22-150. New Wayfarer: 52-18-145. Bridge is wider than aviators because Wayfarers sit forward of the face.

Round (Lennon, Clubmaster)

Round Lennon: 47-23-140 to 50-22-150. Clubmaster: 49-21-140. Wider bridges for the rounded curves.

Oversize / cat-eye

55-18-140 to 60-20-145. Wide lenses; standard bridge.

Sport / wraparound

Often listed as one number (e.g., "Medium" or "Large"). Specific numbers vary widely; Oakleys and Smiths may not even use the lens-bridge-temple notation. Match by trying the brand's sport-fit equivalent.

Rimless

Sized by lens width and bridge width primarily; temple length less consistent. Most rimless run 52-18 or 54-19.

Bridge Width Specifics

Bridge fit is the most underappreciated sizing dimension. Bridge too small → glasses pinch the nose. Bridge too big → glasses slide down.

Bridge width	Best for
12–14mm	Narrow nose, low nose bridge
15–17mm	Average nose, medium bridge (most common)
18–20mm	Average to wide nose
21–23mm	Wide nose, high nose bridge

Asian fit (Asian-specific bridge engineering) often uses higher bridge with deeper nose pads — addresses the issue that standard Western fit slides down lower nose bridges.

Temple Length Specifics

Temple length is from hinge to ear-tip. Too short and the arms curl forward; too long and they extend past your ear.

Temple length	Best for
120mm	Petite / children's frames
130mm	Small adult / women's standard
135mm	Most common adult
140mm	Standard / unisex
145mm	Standard men's / unisex large
150–155mm	Long / extra-large

Children's Sunglasses

Age	Common size
1–3 yr	40-14-115
3–6 yr	44-15-120
6–10 yr	47-15-125
10–14 yr (small adult)	49-16-130

Kids' sunglasses prioritize fit (no slipping) and impact resistance. UV protection rated to UV400 is essential at any age.

Common Mistakes

Sizing only by lens width

A 56mm lens with an 18mm bridge fits a different face than a 56mm lens with 14mm bridge. Bridge is half the fit.

Buying oversize without checking face width

Oversize at +5–10mm of face width = intentional. Oversize at +20mm = wrong size.

Ignoring temple length

Temple too short = frames slip; too long = arms extend past ear. Match within ±5mm of your usual.

Buying sport sunglasses by lifestyle frame size

Sport-fit sunglasses use different sizing systems. Don't assume your dress frame size translates.

FAQs

How are sunglasses sized?

By lens width, bridge width, and temple length in mm. Stamped 52-18-140 or similar.

What size sunglasses do I wear?

Match total frame width to face width ±5mm.

What's the standard size?

52-18-140 unisex. Women's smaller; men's larger.

What is the bridge?

The gap between lenses that sits on your nose.

What is temple length?

Arm length from hinge to ear tip.

Are sunglasses sized like prescription glasses?

Yes — both use the same notation.

Three Numbers, Right Sunglasses

Match all three to your face. Pull your existing glasses, read the stamp, find sunglasses with similar numbers.

For face measurement see how to measure your face for sunglasses; for related head sizing see how to measure your head for a hat.

Selling sunglasses on Shopify? Show all four fit numbers.

Tailor Size Guide adds bridge, temple, and total frame width to every product so customers match all dimensions to their face.

Install the Shopify app Read the docs