My two incredibly fat male rats both fit in one of these and are very happy with it. They spend nearly all of their time snoozing in it! It also holds up pretty well considering their tendency to chew everything they are given... certainly lasts much longer than any other hammocks I have had from other makers, which is a testament to the workmanship of FuzzButt.
Within seconds of my hanging this choob in the boys' cage, they were inside and hanging out. They love it! And if the boys are happy, I'm happy. I would definitely recommend this for rat lovers! Perfect for two adult rats - maybe three. Holds up great in the wash.