Vintage 60s Vibrant Orange and Pink Floral Print on White Short Sleeve Top by Diane Young - Union made in US
Non-stretchy smooth triacetate. Vintage size 36/16 Fits like: Measures 20" across underarm to underarm (40" around). Bust 36-38" or smaller. 16. 5" across waist. 19. 5" long. 16" shoulders - Model is 5'1" XS so this fit loosely.
Sleeve ends fitted at 12". There is a thin whisp of pink on one sleeve end, on inspection I find this to be the print showing there from material folded under/sewn down inside sleeve - I'll include a closeup of inside of sleeve.

This item is sold from an excellent, highly rated vintage boutique.