Lanyar Fleece Soft Vest Harness No Pull Harness for Cat Dog Pet,Size Runs Smaller,Small fits Pets 2-4 Pound,Medium 6-10 Pound,Large 10-14 Pound Medium Size: Neck 11" Girth 16"-18" ( Color: Turquoise Sky Blue) Lined with warm soft fleece Light-weight Soft Breathable 100% Polyester Material Sturdy D-Ring for leash attachment Please measure your pets carefully for Neck Girth and Chest Girth