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XS-back length:13.5cm/5.31nch,bust:27cm/10.62inch,suit for pet weight:1-1.5kg

S-back length:18.5cm/7.28inch,bust:32cm/12.59inch,suit for pet weight:1.5-2kg

M-back length:22.5cm/8.84inch,bust:37cm/14.561inch,suit for pet weight:2.5-3.5kg

L-back length:30cm/11.41inch,bust:42cm/16.531inch,suit for pet weight:3.5-5kg

XL-back length:33cm/12.99inch,bust:47cm/18.5inch,suit for pet weight:5-7.5kg

2XL-back length:37cm/14.9inch,bust:52cm/20.47inch,suit for pet weight:7.5-10kg

3XL-back length:44cm/17.33inch,bust:59cm/23.22inch,suit for pet weight:10-13.5kg

4XL-back length:48.5cm/19.091inch,bust:64cm/25.19inch,suit for pet weight:13.5-17kg

5XL-back length:55cm/21.651inch,bust:69cm/27.16inch,suit for pet weight:17-20.5kg

6XL-back length:59.5cm/23.42inch,bust:74cm/29.13inch,suit for pet weight:20.5-24kg

7XL-back length:67.5cm/26.57inch,bust:79cm/31.1inch,suit for pet weight:24-28kg

8XL-back length:70.5cm/27.75inch,bust:84cm/33.07inch,suit for pet weight:28-31.5kg

9XL-back length:77.5cm/30.51inch,bust:90cm/35.43inch,suit for pet weight:31.5-35kg