Purchased new and worn once, this special set JSK from BTSSB is super cute and galaxy themed! Comes with matching headbow. Has full back shirring as well as a lace up, and zips on the side. 

Details from Lolibrary:

Bust

90 ~ 98 cm (35.43 ~ 38.58 in)

Length

91 ~ 94 cm (35.83 ~ 37.01 in)

Waist

70 ~ 78 cm (27.56 ~ 30.71 in)

Material

baniran (100% cotton), other (100% polyester), polyester lining