How to measure glasses
These instructions walk you through how to measure a pair of glasses to find a pair that fits you well. All glasses measurements are in millimeters, so you'll need to use the centimeter side of your ruler.
To compare against a pair you already own:
- Frame width: Open the arms of the glasses and measure straight across from one hinge to the other to get the overall width. Stop at the hinges, not at the outer edges of the frame — on most glasses those aren't the same place.
- Lens height: Measure one lens at its tallest point.
- Lens width: Measure one lens at its widest point.
- Manufacturer's measurements: Check the inside of one arm for a set of numbers like 52-18-140. Those are the lens width, the bridge width, and the temple length. They do not include the overall frame width.
