HSEOK Laptop Sleeve, Waterproof Case Bag Cover for 12.9 iPad Pro / 13.3 Inch Notebook Computer / MacBook Air / MacBook This fits my Mac Book Pro perfectly, the dimensions are: 14.29 x 10.43 inches, and the internal dimensions are: 13.58 x 9.84 inches. This is made of foam padding and a nylon lycra fabric lining. This sleeve is great for bump and shock absorption and protection from accidental scratches. I used it for to take my Mac Book on a flight a couple of weeks ago. I was able to slide my Mac Book in and out easily during the TSA security check. I like how it feels like skin on my Mac Book, it’s not at all bulky. I also received a small matching storage pouch bag, to store a mouse and charger. The zipper on the bag glides smoothly and quitely.