Eyeglass Size Guide

Finding the right frame size is an important part of buying glasses online. Fortunately, it’s also very simple! Here is a helpful guide to assist you in understanding eyeglasses size and dimensions when you’re shopping for your next pair of glasses or sunglasses.

To ensure that the frame size is suitable, you must first determine the frame size that fits you best. The best way to do this is to measure the dimensions of a frame you already wear and feel comfortable in.

How to Check My Frame Size?

Before selecting the size of your glasses, it is important to understand the basic structure of eyeglasses. The basic structure includes the frame, temples, and bridge.

Each pair of glasses is slightly different, so the size information might not always be located in the same place. For most glasses, you can find the size information on the inside of the temple, which some people may refer to as the “arm” of the glasses. For example:

Or on a bridge, like this one:

Understanding Glasses Sizes

Frame sizes are usually displayed as three numbers separated by symbols, reflecting the dimensions of different parts of the frame. If you already have a frame that fits well, you can compare the sizes to see which of our frames would be suitable for you.[Choose Glasses Frames]

Let’s take 48▢20-140 as an example to explain what these size values represent.

Lens width(LE)

This is the horizontal width of each lens, measured at its widest point. Also called eye size, it typically ranges from 40mm to 60mm.

Bridge width(BD)

This is the distance between your two lenses. In short, the bridge width is the space where your frames fit against your nose. The bridge size ranges from 14mm to 27mm.

Temple (Arm) Length(TL)

This is the length of the temple from the hinge to the temple tip, including the bended part that sits on your ear. The arm length is typically 120 mm to 150 mm long.

Lens Height

This is the vertical height of your lenses. The measurement for it is taken at the widest point of the lens within the frame. Lens height is especially important when measuring bifocal or progressive lenses.which need to be at least 30mm or more.

*This parameter is generally not printed on the glasses.

Frame Width

We provide frame width values on the purchase page for any frame, if you need to measure the width of your current frame, use a tape measure to measure horizontally across the front of the frame. Be sure to include any hinges or design features that protrude from the side in your final measurement.

*This parameter is generally not printed on the glasses.

Essential Considerations When Choosing Frames

You may choose some frames that are too big or too small because of your personal style preference, but we do not recommend wearing frames that are not suitable for you for a long time. Wearing inappropriate frames for a long time may cause visual fatigue or even worsening of vision.

Calculated by Pupil Distance

It is recommended that you use this formula for preliminary screening of suitable frames.

(Lens width+Bridge width-Pupillary Distance)÷2

The closer the obtained value is to 0, the more suitable it is for you. Try to keep the difference between this value and 0 within 3, so that we can place the center point of the lens in the middle of the glasses frame as much as possible.

48▢20-140
PD:68
48+20-68=0÷2=0
★★★★★

48▢20-140
PD:61
48+20-61=7÷2=3.5
★★

48▢20-140
PD:58
48+20-58=10÷2=5
★

*Select the glasses frame that suits your pupil distance through the product filter [All glasses]

3 factors for a perfect fit

• The temples should be aligned with the width of your face.
• Your eyebrows should be above the frame.
• The frames should not rest on your cheeks.