Ukes Premium Sunglass Strap - Durable & Soft Eyewear Retainer Designed with Floating Neoprene Material - Secure fit for Your Glasses and Eyewear.

Q: Will these fit costa Del Mar reeftons?

I wanted to let you know I reviewed and gave measurements of UKE strap under GAGardener03. This is part of it: The strap allows the sunglasses to easily be put over my head AND my sunglasses don't hang low on my chest (a fact that I appreciate). You have an approximate 15 inch length between the two (2 inch) areas that attach to the temple tips. * For a total of 19 inches ... but depends upon how far up you push the two temple tips on your bows. No idea what type of temple tips/bows you have, but I have triangular ones. It was an effort to get them on, but they work just fine.

Q: Will these fit aviator frames?

It will fit any frame but check the aviator ear pieces. My wife's slide off if you pull on it a little.

Q: Do they fit Persol sunglasses?

I don't know, I have Raybans and they fit perfectly. They fit like a Croakie would.

Q: Will the ukes fit a 10 yr old's clear rx glasses? She will be kayaking and needs glasses to see, but they need to float if dropped in water.

These will float, but I have found that they also tend to slip off. The inner portion of the strap is not "sticky". it is fabric and does not grip well. I really have not used mine because of this. It is really annoying how they kept falling off. There may be better solutions for your 10 yr old.