Doesn't matter, the fact is he is lacking size for her. So please don't go with that bs of size doesn't matter. Even OP's husband realized size does matter for their case.

People here are being foolish, the husband was testing her because he was already insecure about his size. Anyway, it doesn't matter anymore. OP had no frame of reference, she could've lived thinking that her sex life could not get any better but he brought the sleeves. She didn't know and he didn't know. The husband must deal with the fact he is lacking size for her, or better said, he could've been a better lover merely by the fact of having a bigger penis. It's better to figure this out before marrying, however they didn't know. He should just carry on and keep using the sleeve.