This is a beautiful vintage 90s blouse from the brand Petite Sophisticate. It is made of a lightweight, silky material and features a colorful abstract print. The blouse has a relaxed fit and a slightly cropped length. Shoulders are adjustable with 3 buttons. Size tag has been taken off but based on measurements I’d have to say a petite small
Measurements approximate:

Pit to pit 19.25”
Shoulder 15”
Has shoulder pads