Glasses Frame Sizing | What Do The Numbers Mean?

Scared about ordering glasses online? Not sure how to find out your glasses' frame sizing? Confused about those numbers on the inside of your frames? We've got your answers here. Stick around to find out.

If you want to learn more, please visit our website.

Glasses frame sizing? What do the Numbers Mean?

1. The Numbers on the Frame
2. What is Lens Width?
3. How can I Measure It?
4. What Size is Right for Me?
5. Prescription Glasses at SportRx

Rather than just giving you the short version, Eyeglass Tyler goes in depth on how to understand the measurement information on your glasses. We cover how to differentiate between model information and frame measurements, explain the different glasses frame sizing systems, and help you figure out how you can measure your glasses yourself. By the end of this article, you'll know how to find out which frame (and its' size) is right for you.

The Numbers on the Frame

Frame measurements are pretty consistent across brands, indicated by numbers on the inside of the temples or possibly on the nose bridge if your frame is made of metal.

The size of your frame will always be measured in millimeters. You'll see a number such as 48, followed by a square symbol and a smaller number, such as 22. Last will be a larger number, such as 138. See it on the Maui Jim Koko Head below.

That first number refers to the lens width at its widest point, while the second number is the bridge width, or the distance between lenses at its most narrow. Finally, the last number is the temple length. Tyler points out that the temple length isn't super important when determining whether the glasses will fit you.

As for model information, most brands will have some form of acronym followed by a code. Maui Jim, for example, writes their models as MJ followed by a four-digit number. On the other hand, some brands will simply print the frame name, like the Oakley Holbrook. You may also see a dash and some other numbers, which usually refer to the color code.

What is Lens Width?

Lens width is measured from left to right at the widest point in the lens. Between a 52 and 54 eyesize, the 54 will have a wider lens so the whole frame will be wider too. The lens will also be a little taller to preserve the shape. The bridge and temple measurements will usually remain the same.

Ray-Ban in particular makes different eyesizes so you can rock the same look whether you have a big head or not. Consider the New Wayfarer, which comes in three eyesizes of 52, 55, and 58.

These sunglasses may all look identical in pictures, but they fit three head sizes!

How Can I Measure It?

You may not know what the measurements of your glasses are. Either the manufacturer didn't print the numbers (which is uncommon) or they rubbed off over time (which is common). Don't despair! You can just grab a ruler with millimeters and measure the lens at the widest part to find out.

Tyler also points out that it's not necessary to measure the bridge width, since it only indicates the shortest distance between the lenses. This measurement doesn't dictate how well the frame will fit your nose bridge.

Measuring lens width gets trickier if you have a curved frame. If this is the case, SportRx has a great solution: Measure temple to temple. This accommodates for the curved frame and gives a better idea of what size glasses will fit you best. We call this measurement the SFW and have a handy video on how to find yours here: Introducing the SportRx Frame Width.

What Size is Right for Me?

The best way to figure this out is to check the numbers on your glasses so you have an idea of what works for you. And chances are, you already know roughly what head size you have.

If you're not sure, you're probably a medium. Most frames are made to fit that happy medium, so you may not have had difficulty finding the right size glasses for you.

Otherwise, here's a frame of reference:

• Small to Medium: 50-52mm
• Medium to Large: 52-55mm
• Large to XL: 55+mm

To reuse our New Wayfarer example from earlier, the 52 eyesize is a medium fit, the 55 is a large fit, and the 58 is an XL fit. Depending on your personal sense of style, you may even fit two of these but prefer one over the other.

Another thing to note is that frame style can affect lens width as well. For example, a frame with a high base curve like the Maui Jim Kanaio Coast will have a different lens width than the more casual Maui Jim Red Sands. But they both might look great on you. Lens width gets a little trickier when you add these extra variables, which is why we recommend you check out our SportRx Frame Width video for a more standardized frame fit.

If you want to learn more, please visit our website ruiqi.

Even if you do end up getting the wrong size, thanks to SportRx's See Better Guarantee, you'll never have to be stuck with ill-fitting frames.

Prescription Glasses at SportRx

Need prescription glasses? Done. When you shop with us, you&#;ll find video guides and tooltips throughout the build process as you customize the perfect pair. An answer to all your questions is at your fingertips, and if you want to chat with an expert, Contact Us. We&#;ll put you in touch with one of our friendly in-house opticians who can help you build your prescription glasses.

Ditch risky online shopping with the See Better Guarantee. Try your glasses or sunglasses for 45 days. If you&#;re not satisfied, send them back. Get a full refund, exchange, or credit towards a better pair. And return shipping? Covered. Get your pair of prescription glasses at SportRx today!

Whether you're shopping for glasses online or in person, you want to find a stylish pair with the most comfortable fit. As you shop, you'll notice a series of numbers on the JINS website or printed on the frame. These numerals indicate the glasses' measurements and can guide your decisions when comparing frames&#;especially if you're comparing against a pair you already wear and find comfortable. Here's what you need to know about measuring your eyeglass size.

Understanding the Frames' Dimensions

Knowing the frames' dimensions will make it easier to find a flattering pair of glasses that won't irritate pressure points and cause tension headaches. You can find this information on the temple arm of any pair of glasses. The temple arm is the part that is screwed to the main body of the frame and rests behind the ear.

Each measurement is presented in millimeters and separated with a dash or small icon:

• Lens width: The first number in the sequence indicates the lens's horizontal diameter or width from the widest point.
• Bridge width: The middle number refers to the bridge's width or the metal or plastic component that crosses the nose to connect the lenses.
• Temple length: The third number is the length of the temple arm.
• Lens height: JINS includes a fourth number in the sequence, which refers to the lens height or the tallest point from the top to bottom of the lens.

In addition to the individual lens width, JINS provides the overall frame width on each product page. This measurement gives you helpful context when trying on frames virtually or in person. If you like how a specific pair looks and feels, the overall width can help you find similar styles.

Here's how JINS categorizes overall frame widths, so you can use the site filters to shop for the perfect fit:

• Extra-Narrow: 100-126.9mm
• Narrow: 127-130.9mm
• Medium: 131-139.9mm
• Wide: 140-143.9mm
• Extra-Wide: 144-180mm

Consider Width and Face Shape

The overall frame width also matters because it determines whether a pair of glasses is truly proportionate to your face. How glasses look and feel can be related, which means you have to consider your individual face shape in addition to the written measurements. For instance, frames that are too narrow could make a round or heart-shaped face look wider and may even create pressure at the temples. Oversized frames might look too wide and overwhelm a slender face and feel heavy to wear.

Make sure the frame width doesn't extend too far past your temples&#;you should only be able to fit one finger at most between your face and the beginning of the temple arm. Otherwise, the glasses are too wide and won't stay put.

Lens height can also influence whether glasses look proportionate and feel comfortable. The frames' top line should be similar to your eyebrow shape, and your brows shouldn't be visible through the lenses. If they are, the lenses might be too tall, which reduces the sense of balance between the glasses and your facial features. The bottom of the frame should rest above the cheeks for the most comfortable fit.

How Lens Thickness Can Affect Fit

Lens thickness is based on the strength of the prescription. Individuals with stronger prescriptions generally need thicker frames, though many eyeglass makers can now create lighter, thinner lenses for high-index prescriptions.

Why are lenses with stronger prescriptions thicker? The refractive index measures how much the light path bends as it travels through the lenses. To correct refractive errors, the lenses must be thicker to allow the light direction to bend and reach the eye properly.

The higher the frames' lens width, the thicker the lenses must be. But thick lenses can make glasses heavy and uncomfortable. The weight could also cause the frames to slide down the nose. That's why it's best to stick with a lens width of fewer than 50 mm when the prescription is +/-6.00.

The lens height is a crucial eyeglass measurement for bifocal and progressive lens wearers. A lens height of at least 30 mm is large enough to ensure each part of the lens can accommodate each field of vision in the range.

Taking Measurements With a Current Pair

If you already own a pair of glasses with a comfortable fit, refer to the measurements on the temple arm when shopping for a new pair of glasses. If you can't find or read the numbers, don't stress. All you need is a millimeter ruler. Measure the lens height and width, bridge, temple arms, and frame width of the frames you currently wear.

There is some flexibility, especially if you're shopping for a similar shape or style. The bridge width can be within 2 mm of your current frames and still provide a proper fit. All other measurements can be within 2 to 3 mm of the corresponding dimension on the frames you already have.

Now that you know how easy finding the perfect pair can be, check out our selection of stylish eyeglasses for men and women. Our collections are categorized by fit, and you can filter the frames based on size and shape to find exactly what you're looking for.

If you want to learn more, please visit our website Optical Glass Lens.