Have you ever noticed that Chihuahuas are unaware that they’re small? One needs just to observe a Great Dane and a Chihuahua interact to realize that each one sees their physical stature based on their observation of the other. Therefore, the Great Dane thinks he’s small and the Chihuahua thinks he’s big.
I just realized that I'm a Chihuahua. I'm that little dog that didn’t realize that I was little. At least until recently. I saw a picture of a group that I was in and saw that I was the shortest. Then, I looked at past photos and was shocked that I've always been the shortest. I didn't know.