Colorful blouse for women

One of my favorite blouses but not my for my age anymore. Beautiful colors and style. This blouse is a vintage out of my closet and I am positive that is an small size because I was small. It runs loose on small. Will fit a medium slim. It has a minor issue in the waist with the elastic just need to be re-sewing and good to go. See pictures please. And ask me questions. Even though is old, colors are intact as well as fabric. I don’t have the fabric type either because it does not have the tag.