This is one of the best inventions for people who like to carry a tote bag. This slips into your bag and has many different pockets and a zipper section that you can put all your stuff in then when you want to switch it to another bag you just pull it out by the handle and all your stuff comes with it and you can move it bag to bag. It also makes things much easier to find in the depths of the tote bag. This measures approximately 12 x 5 1/2 by 5 1/2 so will fit in most bags. New with tags.