knee-high to a jackrabbit

(redirected from Since someone was knee-high to a grasshopper)

*knee-high to a jackrabbit

 and *knee-high to a grasshopper
Rur. very small or short. (Usually used to describe children. *Typically: be ~; since someone was ~.) I've known you since you were knee-high to a jackrabbit. My, how you've grown! The last time I saw you, you were knee-high to a grasshopper!