EZGO 20 Pieces (Size S) C-Shape Teeth Whitening Cheek Retractor, Disposable Dental Mouth Opener, Dental Lip Cheek Retractor for Mouthguard Challenge Game

They are of good quality, you receive a fair amount for the price. I found them to be a tad on the big size, even for adults.

I don't use these for whiten. I use them to take intraoral photos on children's teeth. This size is great for kids!

Since the product is being promoted for use in the mumble mouth game, I would suggest making it a multi size package. The small one is okay but some mediums would be nice. It would also be helpful to include some instructions for use, just a picture or two. Having played the game with disposable rubber circles and failing miserably, I wanted to buy something that would work better. I'm not so sure I've found them.

These are awesome! We use them for games with kids - they try to say phrases with them in their mouths, and it is very funny!

Purchased to use with a game not for actual dental use and worked for our needs.

Hurts clients mouth because the plastic isn't flexible like my other small retractors.

Small for most fits me fine

The size is perfect for kids. We bought these as extras for the Watch Your Mouth game and the kids had a blast. (9yr old girls)