This dress is a beaded lace ball gown.

Sizes are Australian sizing:

Australian size 6 is US size 2

Australian size 8 is US size 4 

Australian size 10 is US size 6 

Australian size 12 is US size 8 

Australian size 14 is US size 10

Australian size 16 is US size 12 

Australian size 18 is US size 14