The Capo Journal · Fit Guide
The numbers printed inside your temple aren't decoration. They're the anatomy of a perfect fit.
At Di Capo, our frames are designed to adapt beautifully to most faces. But if you want to go one step further — as any true capo would — knowing your measurements can turn a good fit into a perfect one.
The three key numbers
When you see something like 50–20–145, you're looking at the anatomy of the frame:
- 50 mm — lens width: the width of one lens
- 20 mm — bridge width: the distance between the lenses
- 145 mm — temple length: the length of the arms, from hinge to tip
These three define how your glasses sit, feel, and look on you.
How do you know your size?
If you already have a pair that fits well, check the inside of the arm. You'll likely see three numbers like the ones above — that's your size reference. But if you don't have one, use the credit card trick.
The credit card trick
Grab any standard credit card. Stand in front of a mirror, hold the card vertically aligning one edge with the centre of your nose, and see where the outer edge lands relative to your eye:
| Where the card ends | Your frame size |
|---|---|
| Ends at the edge of your eye | Medium — standard, fits most Di Capo frames |
| Goes past the edge of your eye | Small — opt for narrower frames |
| Falls short of your eye's edge | Large — choose wider frames |
It's not scientific, but it works surprisingly well — and takes 10 seconds.
“Elegance should feel natural, effortless, yours.”