Question: what box size do i need?
Answer: Small — Small boxes measure 16” x 10” x 10”. ... 
Medium — Medium boxes measure 18” x 14” x 12” and are great for things like towels, DVDs and decorative items.
Large — Large boxes measure 20” x 20” x 15”. ... 
Extra-large — Extra-large boxes measure 23” x 23” x 16”.