Beautiful floral everyday dress

I bought it here, but it's too big for me. Green dress with brown flowers, elastic at the waist, cuffs at the ends of the sleeves. I am 163 cm tall, with a bust circumference of 124-126 cm, and the dress is way too big for me, it would look better on a taller girl. Length from shoulder to hem is 137-138 cm. Sleeve length measured from the armpit is 38-39 cm. It's difficult to measure the width under the armpits at the bust, as the fabric in the bust area is kind of overlapped and held together with a snap button. +DPD; Omniva