Have you ever seen people with small marks on their noses from wearing glasses? Or felt pain behind your ears that disappears once you take your glasses off? These are signs that the glasses do not fit properly. Choosing the right frame size is an important step when buying glasses online, but the good news is- it is quite easy!

A good-fitting pair of glasses should sit comfortably and share the weight evenly between your nose, ears and head. They should also suit your face shape. So, how do you find the right frame size? Keep reading to learn how to measure your perfect size, which frames match your face shape and what those small numbers on your glasses really mean. 

How to tell if your glasses fit your face properly?

Wondering what a well-fitting pair of glasses should feel like? The first sign is comfort. Your glasses should not leave red marks or cause pressure behind your ears. Here are a few other things to check when finding the right fit:

• The bridge (the part that rests on your nose) should sit comfortably and match your nose shapes. 
• The top edge of your frames should sit just below or along your eyebrows, not above them.
• Your frames should not be wider than your face, especially at the temples.
• The bottom of the frames should not touch your cheeks, as this can lead to rubbing or discomfort over time.

Shopping for glasses online made simple

Buying glasses online can seem tricky when you cannot try them on, but it is actually easier than you think, especially if you already have a pair that fits well. Start by checking the size of a pair you already wear and feel good in. Most glasses have their glasses measurements printed on the inside of the temple (the part also called the “arm” of your glasses).

You will usually see three numbers like this: 48-19-140. These numbers show the size of different parts of the frame to help you find the right frame size. The numbers on your glasses, listed from left to right, represent:

• Bridge width (the part that sits on your nose)
• Lens width
• Temple length (the arms that go over your ears)

Sometimes, you might see a fourth number, which shows the lens height. All of these glasses measurements are given in millimeters, so be sure to check them when choosing new frames for the best fit. 

Lens width

This is how wide each lens is across, measured at its widest part. Also known as eye size, it usually ranges from 40 mm to 60 mm.

Temple (Arm) Length

This is the length of the frame’s arm, from where it connects at the hinge to the tip that curves around your ear. Temple lengths usually range from 120 mm to 150 mm. 

Bride width

This is the space between the two lenses- basically, the part of the frame that rests on your nose. Most bridge widths fall between 14 mm and 24 mm.

Lens height

This is how tall each lens is from top to bottom at its highest point. It is especially important if you need bifocal or progressive lenses. 

How to measure your face for the right glasses fit

If you are buying glasses online and do not know your size, do not worry! It is easy to measure at home with just a ruler. Here is how to measure sunglasses or eyeglasses:

• Stand in front of a mirror and place the ruler across your face, lining it up with the outer edges of your temples.
• Measure the distance between your temple in inches.
• Multiply that number by 25.4 to convert it to millimeters.
• Next, check the total frame width of the glasses you want. This includes the width of both lenses (lens width x 2) plus the bridge width (the part that rests on the nose). 

Try to choose a frame with a total width that is within 3mm more or less than your face measurement. This will give you a comfortable and well-fitting pair of glasses.

How can you choose the right frame size for your face?

Less than 129mm:

If you have a small or narrow face, look for frame sizes under 129 mm for the best fit. 

130-139 mm:

If your face is medium-sized, eyeglasses frames sizing between 130 mm and 139 mm should suit you well. 

Over 139 mm:

For wider faces, choose eyeglasses frames sizing over 139 mm wide to ensure a comfortable and balanced fit. 

Face shape tips based on your face

Choosing frames that complement your face shape can enhance both comfort and style:

• Round face: Go for angular or rectangular frames to add contrast.
• Heart-shaped face: Light-colored or rimless frames balance the forehead. 
• Square face: Try rounded or oval frames to soften strong angles.
• Oval face: Lucky you- most frame shapes will suit you well!

Suggested Read: Find Your Perfect Pair: Eyeglasses and Sunglasses for Every Face Shape

What frame materials should you consider?

The material of your frame also affects fit and comfort:

• Plastic frames: Lightweight and colorful but less adjustable.
• Metal Frames: Slim and durable with adjustable nose pads. 
• Acetate: A sturdy plastic that comes in vibrant colors and stylish designs.
• Titanium: Hypoallergenic, flexible and very lightweight- great for long wear. 

Conclusion

Wearing the right glasses size makes all the difference in comfort, style and overall eye health. Whether you are shopping online or in-store, understanding measurements and fit ensures you will pick glasses that not only look great but feel great too. If you are still unsure how to measure spectacle frame size, reach out to Prism Eye Care stores today to find out your perfect fit!

Also Read: Types of Sunglasses: Discover the Best Fit for Your Look