It's Asian size,please check the detail size on the size chart image.
<br />100% Brand New.
<br />Weight: 206-248g
<br />Materials: Cotton Blends
<br />Two Colors for selection:  Black , Dark Gray
<br />2 Sizes available:
<br />Asian M  (US S(4) ,UK 4, AU 6)
<br />Asian  L  (US M(6) ,UK 8, AU 10)
<br />Size: There are three  sizes (M, L and XL) available for  the following listing. Compare the detail sizes with yours, please allow 1-2cm  differs due to manual measurement, thanks (All measurement in cm and please note  1cm=0.39inch)
<br />Hint for choosing proper  size:
<br />1. Use similar  clothing to compare with the size.
<br />2. Choose  larger sizes  if your size are same as the flat measurement              Size chart
<br />NOTE: As different computers  display colors differently, the color of the actual item may vary slightly from the  above images, thanks for your understanding.
<br />Package  Content:
<br />1 x Long Sleeve Mini Dress