Riddle

I start new then become old. Start clean but be one dirty. I usually start big then become little. What am I?

Choose an answer

A.A car
B.A carpet
C.A toy
D.Shoes
Hint: It's a word with 5 letters, starting with "S".

Answer

Shoes

Why this is the answer

New shoes start clean and small-feeling, but wear down, get dirty, and (for a growing kid) quickly become too tight.

This riddle is filed under "What Am I?" Riddles and rated Medium.