Meta AI Glasses: How to Choose the Right Size and Fit

Updated: September 26 2025

Getting the exact fit when buying Meta glasses can be a complex process, especially as some of the glasses have large and standard categories. This guide will help you find your best match. 

There are three major things to consider when choosing glasses size. They are:

1. Size - all the dimensions of all parts of the glasses
2. Fit - how much of your face it covers
3. Bridge and Nosepads - Do they sit well on your face? (Your nose in particular)

Let's dive into each of them.

How do you measure size?

There are 4 dimensions you can measure on a pair of AI glasses. They are:

1. Frame size
2. Lens height
3. Bridge width
4. Temple length.

The frame size is the dimension that's usually highlighted, but others like lens height and temple length play important roles. Let's talk about each of these some more.

Frame Size

The frame size refers to the horizontal width of the frame, measured between the center of the left and the right hinge. See the range in the chart below:

To find your correct frame size, use a ruler to measure the hinge-to-hinge distance of a pair of glasses that you already own and that fits you well. Consider an error range of +/- 4mm. 

Lens Height

They're important because they ensure that your eyes are properly centered in the glasses. 

Bridge width

This measures the part of your glasses that sit on your nose. 

Temple length

The temple length of your glasses is the length of the arms of the glasses, the parts that sit on your ears. if they're too long or too short, you will experience discomfort.

NOTE
The measurements in the tables above are guidelines and if you already own a pair of glasses, you will see some numbers engraved on the inside of one of the handles:

The first one is the Model name, then the Lens width and Bridge width. There is usally a third number which represents the Temple Length. Sometimes there is also a fourth number which is the Lens Height.

Each of these numbers is measured in mm and are the best way to determine what size of glasses you wear.

What’s the fit?

Fitting is the amount of face coverage - the area of your face your glasses cover.

As can be seen in the image, there are three different fits available to choose from. These are unrelated to size and are more concerned with lens width.

The three possible fittings are:

• Narrow: a small lens front for those who prefer to cover a smaller portion of the face.
• Regular: a medium lens front designed for those who prefer to cover an average portion of the face.
• Wide: a larger lens front designed for those who prefer to cover a greater portion of the face.

Bridge and Nosepads

The nose bridge is the raised area at the top of your nose where glasses rest. On a frame, the bridge is the central piece that connects the two lenses; its width (in mm) and the angle/placement of the nose pads determine how the frame sits on your face.

What are nose pads?

Nose pads are the contact points that sit on either side of your nose. Some frames, like the Ray-Ban Metas and Oakley Meta HSTN, have integrated/moulded pads (not adjustable), while others use separate pads on small arms that an optician can adjust for height, angle, and spacing. The Oakley Meta Vanguard comes with add-on bridge pads for both high and low-bridge users. 

How to tell if you need low‑bridge or high‑bridge fit (at home)

1. Mirror/pupil‑line check: Look straight ahead. Imagine a horizontal line through your pupils.
   • If the top of your nose bridge sits above that line, you likely need a high‑bridge fit.
   • If it’s level with or below that line, you likely need a low‑bridge fit.

2. Wear‑test with current glasses:
   • If frames slide down, sit too low, or touch your cheeks, try a low‑bridge fit.
   • If frames perch high or leave a gap above the nose, try a high‑bridge fit.

3. Photo check: Take a clear, well-lit selfie with a neutral expression. Draw a straight line across your pupils in the image; compare where your nose bridge sits relative to that line. If its higher than the line, you need a high-bridge fit, if its lower you need a low-bridge fit. 
   Alternatively if you have a ruler you can hold it straight across one side of your face, starting from where your nose bridge is. If the ruler covers your eye entirely you need a high bridge fit, if it covers only partially, you need a low-bridge fit.

   Image credit: August Friday
   

Conclusion

With the above info you should be better equipped to make buying decisions about what size to get when shopping for your Ray-Ban Meta smartglasses.

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