Fittys are designed to fit over all prescription glasses. They have fit over large frames, small frames, nylon frames and metal frames.

However, we know that fit is not just about fitting over your glasses but also about you enjoying how Fittys look when you wear them.

This is a personal issue, and we respect that!

This is why we offer free shipping on all US orders and a 90-day money-back guarantee.

If you don't like how they fit, please send them back!

For sizing, Fittys have an inside diameter of 142mm and height of 50mm.

In May of 2026 a larger size with a 152mm inside diameter and a smaller size with a 145mm inside diameter will launch. Sign up for our email list now to receive alerts when they're ready.

In short: because of higher quality materials that make our product more expensive to produce. We're a fan of the term, "if you're going be a bear, be a grizzly."

Meaning, if you're going to do something, you should do it right.

We have multiple pilots that wear our sunglasses.

We have customers in North Pole, Alaska. who use our glasses for their commute.

We know that Fittys are trusted to protect your eyes. And your eyes are very important!

We have polarized Carl Zeiss lenses. They're so high quality you can see your digital display with them. Our lenses are the same lenses that go into the biggest brands in luxury eyewear and also into the sunglasses that professional athletes wear.

For the frames, we use TR90 biomaterial frames. They're made from a heat-resistant thermoplastic that's made in a special facility in Switzerland. If you forget them on your dash, they won't get damaged.

Also, we use a luxury manufacturer in Mauritius, an island east of Madagascar. The French luxury eyewear industry moved manufacturers there, so although it's more expensive than other places to produce Fittys there, we get a consistently higher build quality.

We also stand by our quality. We have a 90 day money back guarantee. If you don't like them, you can send them back to us with no questions asked.

We (the founders) tried over 40 pairs of fit-over sunglasses that were available on the market before starting Fittys. There were a few major problems we found with all existing options that we are looking to improve on with Fittys.

#1 - Lens quality. Most existing fit-over brands have a lens quality that is either poor or unknown because they don't advertise it. As the whole point of sunglasses is to put protective lenses in front of your eyes, we went with the highest quality lens provider in the world for Fittys by partnering with Carl Zeiss for our lenses. They have great clarity. They're super durable. Also, our polarized lenses have a scratch-resistant coating.

#2 - Design. Which glasses you like is of course a personal choice, but a lot of the existing fit-overs in the market look like medical devices. We didn't like this. Instead of going that route, we chose to invest in design to create something more modern and timeless.

#3 - Frame material. We wanted a quality frame material. We went with TR90 which can be sat on, dropped, left on a hot dashboard etc. and keep going without being damaged. (Also our frames are made of 58% biomaterial sourced from a carbon-neutral plant.)

These changes are so different that we believe Fittys is a unique and premium product in this market.

We know we're not a fit for everybody, but just wanted to explain our thoughts behind the design of Fittys and give context as to why we prioritized these differences.

Fittys™ was founded by a husband and wife team that wanted to stop squinting.

We both wear glasses and we were constantly frustrated with our sunglass options.

We came up with the idea in the Fall of 2023 and launched on Kickstarter to a very positive reception in June of 2024. It's been exciting since!

Prescription sunglasses are unnecessarily expensive, pretty annoying to buy, and need to be updated each time your prescription changes.

Clip-ons are fragile, also expensive, and it's difficult to find any pairs in the secondary market that fit your frames. 

Fit-over sunglasses are an option. However, they're almost an unknown product. Also, for those who do know about them, they're frustrated with the existing options as most on the market look like medical devices. 

In response to this, Fittys™ was created to bring great design, quality manufacturing, and a real solution to this problem in the world.

Stop squinting. Enjoy Fittys™ 😎

Fittys help people with macular degeneration see the world more clearly. We use Carl Zeiss lenses because they are world-class. These lenses provide high contrast. This makes colors look deep and edges look sharp. When you can see details better, you feel more confident.

Our lenses are also polarized. This blocks blinding glare from the sun and the road. Glare makes it hard to see, but Fittys filter it out. This allows your eyes to relax and see through the brightness.

Fittys also offer full UV protection. This keeps your eyes safe from further sun damage. You can wear them right over your current prescription glasses.

We want you to feel sure about your choice. That is why we offer a 90-day money-back guarantee on all orders. Try them out and see the difference for yourself.

Yes! Fittys are often worn by those who aren't wearing glasses just for the style and the luxury-quality lens.

In short, because the lenses block 100% of UV rays and UV rays are what trigger transitions to get darker, Fittys provide darkness while also stopping your transitions from getting darker. Considering this, Fittys should provide darkness while avoiding any redundant darkening. However, for an abundance of caution, we do not recommend wearing Fittys over your transition lenses while driving.