knee high to a grasshopper

   “'What I came to say was: Have you seen Small anywhere about?'
   'I don't think so,' said Pooh. And then, after thinking a little more, he said: 'Who is Small?'
   'One of my friends-and-relations,' said Rabbit carelessly.
   This didn't help Pooh much, because Rabbit had so many friends-and-relations, and of such different sorts and sizes, that he didn't know whether he ought to be looking for Small at the top of an oak-tree or in the petal of a buttercup.”

A. A. Milne - The House at Pooh Corner