Well, since I am 6'4" and the wife is 5'5" I guess I am the big one.
Seriously though, I prefer to be the little one, mostly because I can't fall asleep on my side. This works out good since the wife can only sleep on her side.
Lol. That's cute--the big spoon or the little spoon. Never heard of that. I'm the little bitty spoon! I'm the size of our 12 year old! Lol. My Lovie is average height and size while I'm super small and short.
My husband and I are practically the same size. We're both 5'6" and I maybe weigh 20# less than him. He's really thin for a man but muscular. He trained in martial arts for several years.