Abstract: According to the shape of breast,this study makes an analysis of the balance of women′s pattern by broadwise and lengthwise way separately,and the concept of breast projection quantity is proposed.The impact of breast shape on the quantity of breast projection and eventually on the balance of pattern and fitting of the dress is discussed.Besides,there are many other related factors which also play a part in the balance of pattern,such as the elasticity of fabric,shoulder pad and so on.It has drawn a conclusion that based on the shape of breast,the balance of women′s pattern can be solved more visually and conveniently.