VTG 70s ruffle polka blouse, sz Medium

This blouse is totally awesome and so 70s!!reminds me of square/line dancing, and would be a sin not to pair with denim. Could not make out the tag, but a true treasure. Measurements are approx and laid flat Pit to pit: 22 1/4” Length: 24” Care instructions: (hand) wash warm with similar colors. Tumble dry low heat or hang dry.