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DIY Guide: How To Measure Eyeglasses Size

A step-by-step guide to help you accurately measure eyeglass frames for the perfect fit when buying glasses online.

Find your frame dimensions

Grab a pair of glasses that fits you just right to find your perfect measurements.

Your glasses might have numbers on the inside of the temple arm. These refer to the lens width, bridge width, and temple arm length. The most important measurement, frame width, will not be printed on the temple arm. You can measure it yourself by following the steps below.

frame measurements inscribed inside temple arm to find the right size glasses
glasses with horizontal arrow across frame to show frame width measurement

Measure Frame Width

Measure horizontally across the frame from hinge to hinge.
glasses with vertical arrow on one lens to show lens height measurement

Measure Lens Height

Measure the lens vertically at its tallest point. If you have bifocals or progressives, this should be at least 30 mm.
glasses with horizontal arrow on bridge to show bridge width measurement

Measure Bridge Width

Measure the distance from lens to lens at the closest point. For the bridge, stick to a range of 2 mm less or more than the measurement.
side view of glasses with arrow showing temple arm measurement

Measure Temple Arm

Measure from the hinge to the bend, and then from the bend to the end of the arm. Add both measurements together for the total temple arm length.
glasses with vertical arrow on one lens to show lens height measurement

Measure Lens Width

Measure the lens horizontally at its widest point.
checkmark icon in a box with an arrow checked off for perfect fitting glasses

Check for Perfect Fit

Your frames will fit great if you stay within a range of 2-3 mm less or more from the total measurement.

Find Your Pupillary Distance (PD)

If you don’t know your PD, you can use our digital PD tool.

eyes with lines on pupils showing pupillary distance measurement

Try Frames On Virtually

After measuring, use our virtual try-on tool to see how the new frames look on your face.

woman wearing aviator glasses on iPhone prototype to show virtual try on

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