Mr. Tall by Roger Hongereaves.

Mr. Tall dislikes his oversized legs. He meets Mr. Small, and when Mr. Small goes for a swim, Mr. Tall can’t, but Mr. Greedy, Mr. Nosey and Mr. Tickle teach him that oversized body parts can be helpful. Mr. Tall decides his long legs are great for walking, and while Mr. Tall made it home quickly, Mr. Small took a year to get home. He is now happy.