Baby wraps

So we kinda want something both myself and my husband can use, that can easily accommodate the change from my size to his size. I've been looking at the Moby wrap but that has sizing stuff on it. But then also says one size fits most. So I'm a little confused. I've also just started looking into the happy baby wrap. Any info on these, or any other wraps you ladies love, have heard of or anything else, will be greatly appreciated. Just please, no slings. Thanks! :)