(Measure from collar line to base of tail)
XS fits dog measuring 8-10 inches / 20.3-25.4 cm. Actual garment size measures 9" long
Small fits dog measuring 10-12 inches / 25.4-30.4 cm. Actual garment size measures 10" long
Medium fits dog measuring 12-14 inches / 30.4-35.5 cm. Actual garment size measures 13" long
Large fits dog measuring 15-17 inches / 38.1-43.1 cm. Actual garment size measures 16" long
X-Large fits dog measuring 18-20 inches / 45.7-50.8 cm. Actual garment size measures 19"