Very small. Too much friction between bracket and skin when you try to have a conversation. Can’t wear it for too long but that might just be me. Might work for others. Good concept, just wish it were a bit larger.

They weren’t as flexible as I expected being made from silicone, the fir is good but everywhere the cage touched I was sweating and as it rubbed it became uncomfortable against my face. I have sensitive skin so I attribute some of the discomfort to that

As others had said these shields are on the small side. If you have a mask that you can put them in you are ok. But again these are not big enough for the average male.