Glasses are like a good pair of jeans: They must fit well to look good. Frames that are too big or small will look off and may pinch your face or slip off your nose.

And just like shopping for jeans, knowing certain measurements will help you find the right fit.

Here are the four key measurements to help you find a well-fitting pair of glasses.

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Face Width

The first measurement to consider is face width. Your face width is the distance (in millimeters) between your temples. This size is important for two reasons.

1. It helps ensure that the frames will fit you comfortably. Picking frames that are too narrow for your face can pinch your temples and give you headaches. Frames that are too wide might slip off your face when you move.
   
   
2. Frame width can also help ensure the glasses look good in proportion to your face shape and size.

To find your face width, use our online face-scanning tool. Once we know your face width, we’ll show you personalized recommendations for frames that fit your face well. Plus, when you click on a particular set of frames in our online store, we’ll tell you whether these frames will fit your face width. Pretty cool, right?

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You can also search our online store by face width. To do so:

• Go to the Eyeglasses page on our website or mobile app
• Select the “All Filters” button
• Select the plus sign next to “Size” to expand the selection
• Check the “Custom” box
• Under “Frame Width,” use the sliders to narrow the results based on the range displayed on your profile page
• The store results will automatically adjust to match your criteria

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Frame Height

Are your glasses for single-vision correction or multifocal, including bifocal, trifocal, and progressive vision correction? Knowing this can dictate what size frame you need. The frame height — the distance from the top of the frames near your browline to the bottom part near your cheeks — is particularly important if you wear multifocal lenses.

Multifocal lenses divide the vision into different zones. For instance, bifocal lenses allow you to see better up close for reading and distance. The lower half of the lens corrects for up-close vision, while the upper half corrects for distance vision.

In trifocals, including progressives, the lens corrects for three vision needs. In that case, the lenses — and therefore frames — need to be tall enough so there’s room for all three lens types.

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Prescription Strength

Prescription strength is another factor that affects frame selection. If you need strong correction, the lenses will be slightly thicker — even with the polycarbonate material that we use for all our lenses. (All XP Health lenses are made using polycarbonate material at no additional cost to you.)

Thicker lenses generally work better in acetate frames. Because acetate frames are slightly thicker, they can better accommodate thicker lenses. In contrast, metal frames are typically thinner, so thicker lenses may extend past the width of the frame. (You may want to upgrade to our ultra-thin lens material for very strong prescription lenses. This keeps the lenses thin and lightweight.)

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Nose Bridge Fit

Lastly, think about how the glasses sit on your nose. This is called nose bridge fit. Your nose bridge type determines how high or low the glasses will rest on your nose and, therefore, fit on your face. There are three main types: standard, high, and low nose bridge.

Nose bridge is especially important if you wear multifocal lenses. That’s because with multifocal lenses, you need the lenses precisely positioned relative to the center of your eye.

If you have a standard or high nose bridge, most acetate and metal frames will fit you just fine. If you have a low nose bridge, search our collection of large nose pad eyewear. The larger nose pads will help the frames fit more comfortably on your face.

Unsure what type of nose bridge you have? Our home try-on kits also come with a nose bridge ruler so you can measure at home. Contact our Member Experience team so they can send you a nose bridge ruler. Chat with us online, email us at concierge@xphealth.co, or call or text 888-974-3020.

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Color and Style Matter, Too

Now that you know the right measurements, check out our tips for choosing the right frame shape, color, and material.

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Still Can’t Decide?

Our concierge service can help you select the best glasses for your needs. Call or text us at (888) 974-3020, email us at concierge@xphealth.co, or chat with us online.