Do your sunglasses feel a little too loose, oversized, or maybe the arms don’t sit quite right?

No problem! If your frames are made from acetate, you can make quick, easy adjustments at home in just minutes.

Acetate is both durable and flexible, which means it’s easy to reshape for a better fit. With just a bit of warmth and a few simple steps, you can have your sunglasses fitting comfortably and securely.

How to Adjust Acetate Sunglasses

At home (acetate frames only): If your sunglasses have acetate temples (the arms), you can carefully dip just the ends into a glass or cup of warm, not boiling water for 30–60 seconds. This softens the material slightly. Then gently bend the back part of the temples (the section that hooks behind your ears) inward. This small adjustment usually stops slipping and makes them a perfect fit.

⚠️ Important: Do not try this with polycarbonate or metal frames, as they can snap or warp.

Optician help: If you’re unsure, most opticians will happily make quick adjustments for you.

Extra grip: Silicone nose pads or temple sleeves can also help keep your frames secure.

Tweaking the Fit

1. Tightening Loose Temples

If your sunglasses feel like they’re slipping off, you can gently bend the arms inward for a snugger fit.

Here’s how:

• Hold one temple near the hinge with one hand, and grip the end of the arm with the other.
• Gently bend the arm inward, toward the other temple.
• Try them on to see if the fit feels better.

2. Adjusting the Temple Curve

If your glasses slide down your nose or don’t stay behind your ears, the arms may be too straight. A small bend at the ends can make a big difference.

To fix this:

• Hold the tip of the arm with one hand, and the base near the hinge with the other.
• Carefully bend the end down and inward so it hugs around your ear.
• Put your sunglasses on and check the fit.

Try It for Yourself!

Personalising the fit of your acetate sunglasses is quick, safe, and makes a big difference in comfort. Take a few minutes to adjust them and enjoy a perfect, custom fit that stays put all day.

Important: If sunglasses are adjusted from the manufacturers standard design template, they are no longer returnable.

The information provided is for guidance purposes only. PUNCH accepts no liability for any damage or injury arising from adjustments made based on the instructions and this video.

This usually happens when sunglasses sit too tightly on the bridge of your nose or the nose pads press down too firmly. A few things can help:

• Check the fit: If your frame is too small, it will naturally leave pressure marks.
• Adjust nose pads (if fitted): Gently widen them, or ask an optician to do this for a better fit.
• Try stick-on silicone pads: These add cushioning and spread the weight more evenly.

If your sunglasses are acetate with molded nose rests, you may simply need a slightly larger frame next time.

Sliding usually means the frame is a little too wide for you. You can:

• For acetate frames: Dip the temple tips (the part behind your ears) in warm - not boiling water for 30 - 60 seconds, then gently bend them inwards for a snug fit.
• Use silicone nose pads: These add grip and stop slipping.
• Ask an optician: They can tighten the temples for you in just a few minutes.

Pinching happens when the temple arms curve in too sharply. To fix this:

• For acetate frames: Warm the temple ends slightly (in warm water) and carefully bend them outwards.
• Have them adjusted professionally: An optician can reshape them safely with heat tools.
• Check the size: If frames are consistently uncomfortable, they may simply be too small - a larger width may be better for you