These tasty little meringue rings, they are simply not made out of egg whites and sugar, but industrial grade silicone, the kind of stuff that's in your bathroom…
Designed by German designer Tanja Hartmann to look just like a little meringue. Luckily they are made out of silicone and not sugar and egg whites, because that makes them a lot more durable but not quite as tasty!
In any case, the ring comes in 3 sizes, which is handy (sorry about the puns!) because the silicone is stretchy.
S = 52-57 EU / 6-8 US M = 58-64 EU / 8-11 US L = 65-70 EU / 11-18 US