| Size | Back Length(A) | Waist(B) | Rough standard weight |
| S | 12.5cm
(4.92inch) | 22~29cm
(8.66~11.42inch) | 1.5～3kg
(3.3~6.6lb) |
| M | 17.5cm
(6.89inch) | 30~39cm
(11.81~15.35inch) | ～8kg
(~17.6lb) |
| L | 23cm
(9.06inch) | 40~49cm
(15.75~19.29inch) | ～20kg
(~44lb) |
| XL | 30.5cm
(12.01inch) | 50~59cm
(19.69~23.23inch) | ～45kg
(~99.2lb) |