I ordered one of these to replace one of our worn out beds.  As soon as I placed it on the floor our two dogs tried claiming it as theirs.  This whole evening as one has gotten up the other jumps right in.  So comfy for them.  We bought the large and it fits my 13 year old Weimaraner, 75 lbs and our 4 year old lab, 65 lbs just perfectly.