How to Measure Girth: Around the widest part of the chest just behind the legs GIRTH 

SIZE CHART: 

Teacup: 8-10 inches

X-Small: 10-12 inches

Small: 12-14 inches

Medium: 14 -16 inches

Large: 16-18 inches

X-Large: 18-21 inches

2X-Large: 22-24 inches

3X-Large: 25-28 inches

4X-Large: 29-32 inches