Wow, interesting! the two I've used so far from that seller are for bantams, and there's no way my ladies could get them to come off. I'm about to try one (the one in my photo) for a young standard sized hen. And as far as my fear of hurting their wings by pulling them through that design, it may be possible that my girls are just overly dramatic. I hope that's what it is. But I'll also ask that seller if she can use a bit looser of an elastic for the next ones I buy just in case.No, I made mine like that with one piece of elastic. My birds could get out of them if they wanted to.
I never had a problem with the elastic cutting into the skin, but I did check fit several times a week.