The bag itself measures 12-1/2" wide by 10-1/2" high and has about a 3" gusset and has been made of a lovely Chocolate Brown Nylon Microfiber-type Material punctuated with a delightful Blue and Warm Yellow Print which has kind of a cotton feel to it. Its Lining is a washable/wipe-able Powder Blue. 2" wide webbing adjustable strap with sturdy, high quality polished nickel fittings. 3 Front Outside Pockets Đ (2 are open pockets you just slip your hand right in; the other closes with a zipper and is also accessible from the inside. Its outside flap also features a hidden magnetic snap. Back Panel has one large open pocket. Side Gusset Insulated pocket for holding bottle at one side; other side has an open pocket. Interior has several compartments for storing all those necessaries when traveling with your little one. At the bottom exterior gusset, there is also a Loop to which is attached a loop that opens and closes with velcro so you can probably attach something else to it, particularly when traveling with lots of 'stuff'.