tips for using The Edge Penis stamina ring

Hi all, I bought this for my OH and we tried to use it oncentre but didn't have much joy. Any tips. .. when to out on, me or him to put it on etc?

I put OHs on after or during a blowjob, gives me time to check it's tight enough but not too tight and stops the awkward pause you'd usually have while putting one on

Hi Jennifer, I'd always believed, fixed cock ring should be put on when flaccid but stretchy and adjustable cock rings should be put on when at least semi erect?