Two anti-snoring rings (with storage) I recently purchased a set of three of these, but I didn't realize they were all the same size. I tried one, but it was too big and I had to squeeze it quite a bit. Since the remaining two won't be used, I'm putting them up for sale. Interested parties, please inquire. * Two anti-snoring rings Ring inner diameter: 17-18mm Anti-snoring measures, anti-snoring, goods, sleep aids, nasal breathing, anti-snoring goods, anti-snoring insomnia prevention, unisex, good sleep, adjustable set of two