This dress is by Punk Rave for their Asian market - this means they have different sizing than their normal range we buy in. PLEASE carefully check the sizing chart for exact measurements on each item of Black Street clothing as they tend to run 1 size smaller than usual. You are purchasing the size in the far left column. 

Labelled size (Asian Size) Au/US equivalent Length Bust Waist Hem
cm inches cm inches cm inches cm inches
XS XXS 54 21.26 74 29.13 63 24.80 111 43.70
S XS 55 21.65 77 30.31 66 25.98 114 44.88
M S 56 22.05 81 31.89 70 27.56 118 46.46
L M 57 22.44 85 33.46 74 29.13 122 48.03
XL L 58 22.83 89 35.04 78 30.71 126 49.61