Great Beds! sizing is JUST RIGHT! I have a 10lb jack Russell and I got the x-small....PERFECT for her as she loves to curl up :) I have a 17lb sheltie....got the small....and the 2 40lb border collies...medium is a perfect fit for them to curl up or stretch out! The sizing is perfect.. The beds are sooooo soft, and love the fact that theyre organic, recycled material. We bought SEVEN of these we couldnt be happier! THANKS for such a great product! Crate mats will be next!