For sizing reference; S is suitable for young ladies under 50kg years old M is suitable for young ladies under 50~54kg years old L is suitable for young ladies under 54~59kg years old XL is suitable for ladies with a bust size between 118~128 cm XXL is suitable for ladies with a bust size between 128 and 136 The above suggestions are based on feedback from buyers and are for reference only.Fairies, you can also refer to the size chart of the product. For those of you who are taller and have larger busts and waists, you can consult customer service for guidance! We are just providing a reference based on most people's body shapes. The final decision is yours to make