I wish it were a hair stretch-ier, getting it on as instructed is uncomfortable to do, but as it stands it's width is too large UNLESS balls and all go in it. Same one 1/2" smaller could service cock alone; stretchier one this size could easily accommodate a full package, balls and all, without being too loose or too tight..
This cock ring is great, super comfortable and perfect for me personally. The bullet vibe included is alright, but the button broke after the second use so now I have to replace it. A bit of a downer.