How To · Fashion · Build
Find Sunglasses That Actually Fit Your Face
Sunglasses aren't one-size-fits-all, despite what department store bins suggest. The right fit depends on three measurable factors: your face width, bridge size, and temple length.
5 min read · IrisMost men buy sunglasses the way they buy shirts: they try them on, they look okay, they buy them. Then they spend the next three years pushing them up their nose or wincing because the bridge digs in. The problem isn't your face—it's that you're guessing instead of measuring.
Sunglasses fit is governed by three numbers printed inside the arm: lens width, bridge width, and temple length. Once you know what these mean and how to measure your face, you'll never buy poorly fitting sunglasses again. This takes ten minutes and requires only a ruler and a mirror.
Sunglasses that fit properly should sit on your cheekbones without touching them, rest on your nose without pinching, and stay put when you move your head.
Step one · 1 minute
Understand the three fit numbers
Every pair of sunglasses has three measurements stamped inside the arm, usually formatted like 54–18–140. The first number is lens width in millimeters. The second is bridge width (the part that sits on your nose). The third is temple length (how far the arm extends). These aren't arbitrary—they determine whether the glasses will sit correctly on your specific face.
Write down the measurements from a pair of glasses that fit you well. Use this as your baseline.
Step two · 2 minutes
Measure your face width
Use a ruler to measure from the outer corner of one eye to the outer corner of the other eye. This is your binocular distance. Now measure from the center of one pupil to the center of the other (pupillary distance). Add these two measurements together and divide by 10—this gives you an approximate lens width. For most men, this falls between 50–56mm. If you're wider-faced, you'll need 58mm or larger.
Measure in millimeters, not inches. Take the measurement three times to ensure accuracy.
Step three · 2 minutes
Measure your bridge
The bridge is the strip of material that sits directly on top of your nose. Measure the width of your nose at its widest point (usually just above the nostrils). Most men have a bridge width between 16–22mm. If you have a wider nose, look for 20mm or larger. If you have a narrower nose, 14–16mm prevents the glasses from sliding down.
A bridge that's too wide will slide down constantly. A bridge that's too narrow will pinch and leave marks.
Step four · 2 minutes
Measure your temple length
Temple length determines whether the arms will sit comfortably over your ears without pulling or leaving gaps. Measure from the outer corner of your eye to the back of your ear, then add another half-inch. Most men wear 135–145mm. If you have a larger head or wider temples, you'll need 145–150mm. If you're smaller-framed, 130–140mm is appropriate.
Temple length is the easiest measurement to adjust slightly with an optician, but getting it right from the start saves time and money.
Step five · 2 minutes
Test fit in-person before buying
When you find a frame in your measurements, put them on and check three things: the lenses should sit on your cheekbones without touching them; the bridge should rest on your nose without pinching; the temples should curve around your ears and rest flat against your head without pulling. Move your head side to side and up and down. The glasses should stay in place without you pushing them up.
If the fit feels slightly off in the store, it will feel worse after an hour of wear. Trust your instinct.
Step six · 1 minute
Know when to adjust or return
If you've bought glasses and they're slightly off, an optician can adjust the bridge or temples for free or minimal cost. But if the lens width is wrong—too wide or too narrow—you need a different frame. Most retailers offer 30-day returns, so use that window if something doesn't feel right after a few hours of wear.
Keep your measurements written down. Screenshot them on your phone so you have them whenever you shop online or in-store.
How to know it works
Properly fitting sunglasses should feel like they're barely there. You won't be aware of them on your face, they won't slide down when you move, and they won't leave marks on your nose or temples after an hour of wear. You should be able to move your head in all directions without the glasses shifting.
Questions at the mirror.
What if I can't measure my pupillary distance?
Ask your optometrist for your PD during your next eye exam—they measure it routinely. Or use an online PD calculator with a recent photo. Most retailers also offer free PD measurements in-store.
Do all brands use the same sizing?
Generally yes, but there's variation. A 54mm lens in one brand might feel slightly different than another due to frame shape. Always try on the specific style you're buying, or order from retailers with good return policies.
Can an optician modify sunglasses that don't fit?
Yes, they can adjust bridge width and temple length slightly. They cannot change lens width. If the lenses are too wide or narrow, you need a different frame.
What if my measurements fall between two sizes?
Round up on lens width and temple length (larger is more forgiving). Round down on bridge width (a tighter bridge is easier to adjust than a loose one).