Vintage Edna Oliver Hawaiian maxi dress floral M psychedelic orange fuchsia blue

This listing is for a gorgeous 1960s A-line maxi dress by Edna Oliver brand of Waikiki, Hawaii. The dress is made of some type of fiber blend. Perhaps rayon with something? Both the material and cut would make this dress comfortable to wear lounging around the house or for a casual poolside gathering. There is no size tag, but it would fit someone typically wearing M. While the chest measurements would allow size L person to put this dress on, the movement would feel restricted due to the size of the arm holes. Please refer to the measurements listed below for the exact sizing.
The measurements laying flat and not doubled are:
length- roughly 50"
Chest (armpit to armpit) 19"
Waist- about 21"
hemline- 46"

The dress is in a good vintage condition with no noticeable issues.