It measures 19" tall x 13" wide x 10" deep.  The wheels are strong, 3" in diameter. The lunchbox measures 10" x 9" x 3", and it attaches to backpack with strong Velcro and hook tabs. The lunchbox is cushioned and insulated, and has a mesh zip pocket.

Inside the front pocket are four pen and four credit cardholders, one zip and one slip pocket, and one keyholder. The cover is cushioned. 

The top handle makes it easy to carry this backpack savings one's shoulders and back. It works very well and is very attractive.