S fit plus size 20W ?? OVERSIZED Women NATORI caftan short dress kaftan red

This caftan is a size Small but it is very oversized !! I tried it on myself as a size XL / 16 and it still was extremely roomy ! I feel as though It would probably be a better fit for someone size 20W with still some room to spare. Good pre-owned condition. From one arm opening to the other 43" Hip is 41 1\2" across laying flat Bottom hemline 39" across laying flat From the shoulder down to the bottom hemline 35" long The SIDES of the dress from the underarm to hemline 32 1/2" long