I ordered this round small for my maltese and a large rectangle for my lab mix (based on the reviews that the medium is huge).  The maltese has taken over the giant medium and isn't that interested in the small round.  It is so puffy, I have been sitting on it to make a dent so that it will hopefully be more appealing to her.  The fabric quality is excellent and the orange chevron print is super cute.  Over all the bed is great.