My Granddaughter and I have been bitten by the crafting bug a few years ago. Even though we do use the shoe box size, we've had to add several , aka at least 6 , of the 16 qt size. they tend to hold some of the bigger items or when we have way to many types of one product.  Now I also am pretty sure they are 16 qt and maybe some 12 qt mixed in, but I have too many of so many different sizes of your products , it's hard to review just one item when I love them all.