Thanks,doubt if they would fit on my Sorun wheels.
FTFYGood grief. Another crap idea, doubtless from a design student who doesn't cycle.
This is more or less admitted on the product website, where the inventor says the idea came to him after nearly knocking a cyclist off on a roundabout. He also says he's a driver and a cyclist.Yet another attempt to get cyclists to accept more and more of the responsibility that correctly rests with drivers, and pay for it.
Doesn't work, is ugly, is blame-shifting/externalisation, see https://www.cyclechat.net/threads/hi-viz-reflective-pros-cons.195317/