Frame Size guide
HOW TO KNOW YOUR FRAME SIZE?
Finding the right frame size is essential for clear vision, all-day comfort, and a balanced look. This guide explains different frame sizes, how to measure your face, and how to choose eyeglasses that fit perfectly, so that you can shop confidently with Optica Kenya.
1. IF YOU ALREADY HAVE EYEGLASSES
Use the Lens Width of your existing frame as outlined below to determine your Frame Size.
|
Frame Size |
Eyeglasses Lens Width |
|
|
Small |
Below 48 mm |
Small Eyeglasses >
|
|
Medium |
49 mm - 51 mm |
Medium Eyeglasses >
|
|
Large |
52 mm - 54 mm |
Large Eyeglasses >
|
2. IF YOU DON'T HAVE EYEGLASSES
1. Take a Credit / Debit Card
This is the approximate width of a medium Eyeglass or Sunglass
2. Stand / sit in front of a mirror
Place one edge of the card on the centre of your nose and the other edge towards the edge of your eye
3. Determine your size based on the position of the card
If the card extends beyond the corner of your eye - Size is SMALL
If the card slightly passes over the corner of your eye - Size is MEDIUM
If the card does not reach the corner of your eye - Size is LARGE
FAQs
What are standard glasses sizes?
Standard glasses sizes fall into three categories based on lens width: Small (below 48 mm), Medium (49–51 mm), and Large (52–54 mm). Along with bridge width and temple length, this frame size system is what the eyewear industry uses to standardize fit across brands. You can view sizes by category here.
What does 52 mm mean in glasses?
52 mm refers to the horizontal lens width, one of three standard measurements marked inside eyeglass frames. Within our frame size classification, 52 mm and above fall under the Large category. View the collection here.
How to measure your glasses size without glasses?
If you do not have an existing pair, a standard credit or debit card can be used as a reference. Positioned against the face in a mirror, its width approximates a medium frame, and its alignment with the corner of the eye indicates whether a Small, Medium, or Large frame size is appropriate, as detailed in the guide above.
Can I check my frame size online?
Yes. If you already own a pair of glasses, check the measurements printed inside the temple arms to identify your frame size. You can then compare those measurements with the product specifications when shopping online. If you're still unsure, try Optica Kenya's 3D Virtual Try-On to see how different frames look and fit on your face before making a purchase.
What is the best glasses frame for my face?
The best glasses depend on your face shape, personal style, and the right frame size. Whether you have a round, oval, square, or heart-shaped face, choosing frames that complement your features can improve both comfort and appearance. Explore our guide on choosing the best eyeglasses frames for your face shape to find your ideal match.
How can I tell if my glasses are too small?
If your glasses pinch your nose, leave marks on your temples, feel tight behind your ears, or become uncomfortable after wearing them for a while, they may be too small. A simple way to check your frame fit is by measuring your eyeglasses before choosing a new pair. Frames that are too narrow can also sit too high on your face or cause pressure headaches. The right pair should fit securely without slipping or creating pressure points, so you can wear them comfortably throughout the day.