NWOT This dog costume is made of microfibre and polar fleece, the head of the dinosaur is stuffed with high quality cotton Size S: neck girth--9.4" ; chest girth--13.0" ; back length--9.0", Recommend for 3.0 to 5.5 lbs. Measurements are very important (especially neck girth and chest girth), please measure your pet and reference the size chart, do not select size based on breed/size name. EASY TO WEAR: Button closure, two snaps around the belly and neck, make it easy to put on and take off. The adjustable touch fastener around neck is for better fit.