Size M: Chest Girth 12.6",Back Length 9.2",Neck Girth 8.6" Made of 100% acrylic yarn,Soft to touch,Lightweight,Very good elasticity. Suitable for Different Occasions:All holidays, daily walking, training, family picnics, and wedding. Durable materal and nice design.Your furry baby will get many compliments wearing our sweater. Bonus Wiz BBQT tape: help to record the growing of your "baby".