I should have paid more attention, because I thought these were the same size. However, they still work. One fits inside the other. These replaced a single generic laundry basket. The two basket system works great because my clothes are now sorted into whites and darks as they get tossed in and have eliminated the sorting step in doing the laundry. I also bought a laundry bag to carry the laundry downstairs. I would recommend getting two bags, one for each and putting the bag in the hamper so laundry can easily be lifted out. Although these are light weight, I don't know if they are durable enough to repeatedly carry up and down stairs.