How do I find my size?
If you have a pair of glasses or sunglasses that are currently a perfect fit, look for the sizing stamped on the inside of the temple. You’ll find up to three numbers on glasses frames, and they stand for the lens width, bridge width, and temple length.These numbers are written on the inside of one arm and may be separated by spaces or dashes. Often, a small square shape separates the lens width from the bridge width.
Lens Width
Lens width, also known as “eye size,” is always the first glasses measurement in the series. It tells you the width of each lens in millimeters. This measurement only accounts for the width of the clear lens that you look through, meaning it doesn’t include any of the surrounding frame.
Bridge Width
The bridge width measures the shortest span between the two lenses in your frames. (Counterintuitively, it’s not just a measurement of the part of your glasses frame called the bridge.) Smaller bridge widths accommodate narrower noses, whereas glasses with larger bridge widths are best for wider noses.
Temple Length
The temple length measures each temple (or arm) of your glasses, starting from the screw where it attaches to the main body of the frame all the way to the tip that goes behind your ear. This measurement often ends in a zero or a five, with 135, 140, 145, and 150 being common standards.

For the majority of shoppers, Standard size will probably be the right size.
Other Glasses Dimensions
The above three measurements are the most important when you’re learning how to read glasses sizes. Opticians and glasses designers deal with a whole slew of other glasses measurements, too, but laypeople don’t often encounter them.
Frame Width
The frame width is the overall width of the entire frame, measured at its widest point (usually from endpiece to endpiece). Rather than looking for an exact frame width number when shopping for new glasses, many people operate by this simple rule: Your glasses frames shouldn’t be much wider than your face, and your eyes should be centered within the lenses.
Lens Height
Lens height is the vertical height of the lens from its lowest to highest point. It’s an especially relevant measurement when you’re getting multifocal or progressive lenses, which need a certain amount of space for their different visual zones.
How To Measure Glasses on Your Own
Curious about your glasses measurements? If they’re not listed on the arm of your frame, or you just want to confirm them, you can always take them yourself. Grab a soft measuring tape or ruler that displays millimeters and examine each part.
How to measure lens width
Measure horizontally across one lens at its widest point. Do not include any part of the frames.
How to measure bridge width
Measure the distance between your two lenses and see how many millimeters are between their nearest points.
How to measure temple length
This one is a two-parter! Measure the temple from the hinge on the main body of the frame to the point where it starts to curve. Then measure from the curve to the very tip of the temple arm. Add these two numbers together.
How to measure frame width
Measure across the front of your glasses frames horizontally at the frames’ widest point. Be sure to include any decorative bits that protrude from the sides so you’re getting the widest accurate measurement possible.
How to measure lens height: Measure across the front of your lenses vertically at their tallest point. (Tip: For any kind of multifocal lens, the lens height should be at least 30 millimeters.)
If you are still concerned you can send us an email at askme@zeyelo.com or call us at 0030 22810 77070 and we will be glad to help