It's about 10" x 16", and about 5-1/2" high. It was just something I had in the junk. I don't know what happened to the lid; I don't use it for this.
It's the size you would use to take a large batch of cookies, 3-4 dozen, in to work. :)
I tried a hanging feeder, but switched to one of those tough black rubber bowls. I have it sitting in a rubbermaid food container. The sides of the container are a little higher than the bowl, and I have a couple of fist-sized rocks next to the bowl so the chickens can't tip it over. Very little...