This is a Women's size XS Nintendo collaboration shirt from Uniqlo's UT graphic shirts line. Features various pixelated "Boo" ghost characters hidden among the polka dot design on the front. No print on the back. Includes a special Mario-themed tag at the bottom hem. Shirt has been regularly worn & washed but is in good shape. 

Measures about 16" wide at the chest and 21.5" from shoulder to bottom.