Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: How deep are the shelves?  Thank you.
Document: I LOVE this swivel storage cabinet. Looks amazing in my daughter's bedroom!! It has nice size shelves so that she can store books, baskets with hair accessories, magazines, etc.
I bought it as it looks pretty the same as pottery barn teen storage, but I have been experience a lot of difficulties with putting everything together . It's really hard and heavy box. The quality is not that great, shelves are good covered from top, from the bottom there is very bad quality . I don't know how long will it serve us but sure- not that long... Think before purchase !
Arrived as expected. Is very heavy. Was not damaged. Layed pieces out before assembly. Went together easily, two people needed for assembly unless really strong. Turn mechanism works really well. Mirror gives you true size and clarity. Cork board needs long tacks. Two shelves adjustable, two stationary. I have white and trim makes it look high end. Enjoying
Love the look but it did arrive with a few flaws. Some cracking in the wood and a chip on an outside piece. The screw covers don't match with the color of the cabinet. It is very solid and is just what we needed for the space. Very happy with the cabinet for the price.
Answer: Shelves are 16 1/2 inch deep and 15 1/2 inch wide