How to Choose a Glasses Size That Really Fits
Choosing eyewear is not only about style. Most fit problems begin with size. Frames can look right in a photograph, but if they are too narrow they will press at the temples; if they are too wide they will slide down. Fit determines whether you will want to wear them every day.
What does glasses size mean?
Every frame has several measurements, but one is especially useful: the total front width from hinge to hinge. It determines whether the eyewear will be stable, comfortable and proportional to your face.
- approximately 135–140 mm: narrower face
- approximately 140–150 mm: standard fit
- over 150 mm: wider face
How to check your size
If you already have glasses that fit well, place them flat, measure the total width from one outside edge to the other and use that figure as your reference point. For a more detailed explanation, read our Fit Guide.
If you have no reference frame, look for simple signals:
- strong pressure at the temples means the frame is too narrow;
- sliding down the nose may mean it is too wide;
- poor stability usually indicates the wrong size or a need for adjustment.
Common mistakes
Choosing by eye
Photographs do not show the exact proportions of your face.
Focusing only on shape
Design matters, but size decides everyday comfort.
Accepting excessive pressure
A frame may feel acceptable for a few minutes and become uncomfortable after several hours.
How a well-fitted frame should sit
- no excessive pressure at the temples;
- no constant sliding down the nose;
- level and stable on the face;
- comfortable after several hours.
Acetate is not completely rigid. A very light initial snugness can be normal, and the temples may settle gently to the shape of the head with wear. The frame should never be painfully tight.
Examples from the YouNick collection
For a wider face or a stronger front, consider Big Star. For more universal proportions, look at Classic or Driver. For more defined geometry, try Lawyer.
Can you choose glasses online?
Yes—if you know your width and understand how a frame should sit. Home try-on gives you time to assess comfort in natural conditions rather than during a rushed fitting.
FAQ
How do I check my glasses size?
Measure the total width of a frame you already wear comfortably.
What do the millimetre measurements mean?
They describe the lenses, bridge and temples, but total front width is often the most useful reference for comfort.
Can glasses adapt to the face?
Acetate temples can settle slightly with wear and can also be professionally adjusted.
What if the frames press at my temples?
They are usually too narrow or require adjustment.