I recently re-bought the Fiber Optics Extended DVD since the one I bought a few years back got lost. I never got the chance to do the Hyper Ring routine since I was missing the ring. Any suggestions on where to buy a ring? And like what material, size, etc? I have 0 knowledge on the topic.

What size do you need.

I have no idea. I want to know all of that.

It doesn't say on the DVD?

After watching it again it looks like a 2-3 inch non metal ring.
I don't think size matters. Lol

Then the OP would be looking for a Bangle Bracelet.

http://www.ebay.com/itm/VINTAGE-PREOWNED......4UtWTFRg

If something larger is desired, then try a Purse handle.

http://www.michaels.com/10233532.html#q=......&start=1

If your are looking for a nice brass or chrome ring, then try this one at a fair price. Most magicians doing ring on and off rope, use this kind of ring.

http://www.wizardcraft.com/accessories.htm Scroll down the page.

Just go to a western store and look for a ring for a sadle or bridle. That's what I use for my ring on chain and it's 2 dollars