VTG 60s 70s FUMI'S ORIGINALS Hawaii Maxi Dress Butterfly Print Size Small?

This vintage FUMI ORIGINAL Hawaiian maxi dress is in very good condition!  No holes or stains.  Missing part of the back silver hook above zipper.   Size tag is missing therefor, please consider the following measurements before purchasing.  Thank you! Measurements (taken while laying flat): Bust (armpit to armpit) - 16"    Waist (side to side) - 15"                       Length (from armpit to end of hem) - 50"