Vintage Multicolored Maxi Dress

1970s long sleeve long dress. A rainbow of colors in an abstract print. Iridescent rainbow buttons at neckline.  Side zip closure. Built in royal blue slip layer.
Condition: excellent
Material: n/a 
Brand: unknown no tag (seems to be handmade)

Size: n/a 
(Always check measurements) 
Pit to Pit: 17" 
Shoulder to Shoulder: 12.5" 
Sleeve: 23" 
Across Waist: 14" 
Across Hips: 21" 
Length: 54" 
**measurements taken flat