S No. (No. 2): Neck circumference 20-25cm Bust 28cm-38cm (suitable for 7 kg or less) 

 M No. (No. 3): Neck circumference 25-30cm Bust 38cm-45cm (suitable for 10 kg or less) 

 L No. (No. 4): Neck circumference 28-33cm Bust 45cm-50cm (suitable for 15 kg or less) 

 XL No. (5): neck circumference 31-38cm bust 52cm-57cm (suitable for 22 kg or less)