Tiny, very tiny
Inside measurements are even smaller, this is the outside measurements.
Unit dimensions: 12.5” x 13.5” x 17.5”
I have no experience using one but I've been told/read they suck at holding a stable temperature.
4 cubic foot mini fridges are cheap or free off of craigslist.
My first season I used one and it worked sweet for a single clutch, add a fan and it would hold 3 tubs no problem.
I used a cheapo thermostat(never again) and after all was bought I had less than $60 into it.