I am posting this because everyone keeps asking about the size - I got this for my two degus, Nibbler and Amy. Degus are bigger than gerbils, but smaller than chins and they fit perfectly in this dust house. I was hoping they could both go in at the same time, but it is too small for that. My goos are about 7-8 inches long not including their tails (they are hard to measure, they are very squirmy). Chinchillas are at least 3-5 inches bigger than that, also not including their tails. If you have a large or fat chin, it is not likely to fit in this bath house.
For my degus, it is great. It is sturdy, ceramic (can't be chewed!!) and is easy to wash. The colors are fairly hideous in my opinion, and mine has a slanted silkscreen of the words "Chinchilla Bath." The ears are kinda cute, I guess, though if they made it without ears I would have gotten it without ears. The open side is not really high enough to prevent all the dust from escaping when they roll, but it does a better job than my previous makeshift bowl did. Since there are very few options out there (basically this and the giant plastic house), I went with the one that will last forever unless I drop it. The color in the video is the lavender, though you don't get to choose when you buy it here.
I hope this helps to decide whether your pet will fit!