He was a mixed breed--very mixed breed, actually!--dog, about 35 pounds of him. A bit funny-looking, with hips taller than his shoulders.
He was affectionate, well-behaved, and funny. Plus, my memories of him have acquired that golden glow of youthfulness... mine, I mean. But he was just a great dog all around.
Oh--"Gimli" was after the dwarf in "Lord of the Rings," and referred to the dog's stature and build.