A perfectly crafted pair of glasses that doesn't fit correctly is a frustrating experience — uncomfortable to wear, unflattering to look at, and potentially harmful to your vision. Yet many people wear ill-fitting glasses without realising it, simply because they don't know what a proper fit feels like. This guide explains exactly what to look for.
The Five Key Fit Indicators
1. Frame Width
The most fundamental fit indicator is frame width. Your frames should be approximately as wide as your face at the temples — the outer edges of the frame should align with the sides of your face, neither extending beyond them nor sitting inside them.
- Too wide: The frames extend noticeably beyond the sides of your face. The temples angle outward rather than running straight back. The frames may slide down your nose more easily.
- Too narrow: The frames pinch at the temples, creating pressure and discomfort. The lenses may sit too close to your face. The frames may leave marks on the sides of your head.
- Correct: The outer edges of the frame align with the widest part of your face. The temples run straight back to your ears without angling in or out.
2. Nose Bridge Fit
The nose bridge is where most of your frame's weight is supported. A correctly fitting bridge sits comfortably on your nose without pinching, sliding, or leaving marks.
- Too tight: The bridge pinches the sides of your nose, leaving red marks or indentations. You may feel pressure or discomfort on the nose bridge.
- Too loose: The frames slide down your nose constantly. There's a gap between the nose pads and your nose.
- Correct: The bridge rests comfortably on your nose with even, gentle contact. No pinching, no sliding. For frames with adjustable nose pads, the pads should contact your nose evenly on both sides.
3. Temple Length and Fit
The temples (arms) of your frames should extend straight back from the frame, curve gently over the top of your ear, and rest comfortably behind the ear without gripping too tightly.
- Too short: The temples don't reach far enough behind your ears, causing the frames to feel unstable or to sit at an angle.
- Too long: The temples extend too far past your ears, potentially poking uncomfortably into your neck or hair.
- Too tight: The temples grip your head too firmly, causing headaches or discomfort at the temples after extended wear.
- Correct: The temples curve smoothly over the top of your ear and rest gently behind it. No pressure, no instability.
4. Lens Position
Your lenses should be positioned so that you look through the optical centre — the point of maximum clarity — when looking straight ahead.
- Too high: You're looking through the lower portion of the lens. The frames may sit too high on your nose or face.
- Too low: You're looking over the top of your lenses rather than through them. The frames have slipped down your nose.
- Correct: Your pupils are centred in the lens opening when looking straight ahead. The top of the frame aligns approximately with your eyebrows.
5. Overall Stability
Well-fitting glasses should stay in place during normal activity without constant adjustment. They should not slide down your nose when you look down, shift when you move your head, or require frequent repositioning.
Signs Your Glasses Don't Fit
Physical Signs
- Red marks or indentations on your nose from the bridge or nose pads
- Marks or soreness behind your ears from the temple tips
- Headaches centred at the temples after wearing your glasses
- Frames that slide down your nose throughout the day
- Frames that sit unevenly — one side higher than the other
Visual Signs
- Blurred vision, particularly at the edges of your visual field
- Eye strain or fatigue that persists despite an accurate prescription
- Difficulty focusing when switching between near and far distances
- Distortion or visual discomfort that wasn't present with previous glasses
What to Do If Your Glasses Don't Fit
Professional Adjustment
Most fit issues can be resolved with a professional frame adjustment. Opticians can adjust nose pads, reshape temple arms, and realign frames to improve fit significantly. This service is typically free and takes only a few minutes. If your glasses are uncomfortable, a professional adjustment should be your first step.
At-Home Adjustments
Minor adjustments can be made at home. Metal and titanium frames can be carefully bent to adjust temple width or angle. Acetate frames can be gently warmed with a hair dryer to make them more pliable before adjusting. Make small changes and test frequently — over-adjusting is easy to do.
When to Consider New Frames
If your frames are significantly the wrong size — too wide, too narrow, or with a bridge that fundamentally doesn't suit your nose shape — no amount of adjustment will provide a truly comfortable fit. In this case, investing in frames that are the right size from the start is the most effective solution.
When choosing new frames, prioritise fit above all other considerations. The most beautiful frames in the world are a poor investment if they're uncomfortable to wear. Explore our full collection in a range of sizes, or browse our Best Selling styles for tried-and-tested options.
The Comfort Test
The simplest test for good fit: put your glasses on and forget about them. Well-fitting glasses should be comfortable enough that you stop noticing them within minutes of putting them on. If you're constantly aware of your glasses — adjusting them, feeling pressure, noticing discomfort — the fit needs attention.
Great eyewear should disappear on your face, leaving only clear vision and confident style.
