Many sites offer this product, but Wayfair was definitely the cheapest, and offered free shipping.  My 7-pound Min Pin outgrew her Toy Dog Single Door Pet Crate because her legs are so long that they started sticking out of the crate.  This one is the perfect size, and you don't have to spend a lot of money on a fancy cushion -- a standard-size (human) bed pillow fits in nicely.  Just put a zippered pillowcase around it (which can be washed weekly), and you're good to go.  I primarily use it to give her a quiet "time out" or for short-term transport, but it's very secure.