ARITZIA Tna HOLD-IT Karelis Cropped Tank

Two cropped tanks. Bought since I was unfamiliar with the sizing. 2XS is too small for me and S is too big. Only worn to try on the size. 2XS SIZING; Bust - 77cm Waist - 57 cm. S SIZING; Bust - 86-89 cm Waist - 66-69 cm. Last two pictures are from the aritzia website but I couldn't find one wearing black. There are stripes on both sides of the shirt so they are not 'plain' all the way around.