EXAMPLES FROM THE WEB FOR KNEE-HIGH
She was knee-high to a grasshopper, and I was shoulder-high.
The lawn is like velvet and everywhere the grass is knee-high.
Why, I ain't bin inside a schoolhouse since I was knee-high to a grasshopper.
He hesitated a moment, then pushed between the knee-high stalks.
Since he was knee-high he's always had an aidge on most folks, 'count of his size an' weight.
Ever since I was knee-high, you have been teaching me to deceive my father.
Ive known her ever since I was knee-high, so, you see, shes not a bit shy with me.
Have you remembered that I've brought her up, so to speak, since she was knee-high to me?
I've known him always, since he was knee-high to a grasshopper.
His white lambskin breeches and knee-high boots were perfection.