Smaller than you might imagine. It’s about the size of a 2quart carton of milk but a little deeper. It works fine and has a separate piece inside to fold your can liners over.  There is no resistance on the opening mechanism the lid flies back when you step on it…be gentle. I like the modern shape and glossy black look but it’s the type of glossy plastic that looks like it will scratch and scuff easily. I would love this if it was 3 gallons instead of 1.