"SANTA'S LIL HELPER" - EMBROIDERED COTTON THERMAL PAJAMAS - ALL SIZES (Small) Super Soft Red Thermal Cotton Dog Pajamas Embroidered with "Santa's Lil Helper" Open tail end for quick potty breaks, Easy to put on and take off Size of the PJ's: SMALL (Back Length: 10" Chest: 13-16" (Most Important) Neck: 10-12") See description below for detailed sizing instruction