Peachy pink plaid button down shirt

Peachy pink plaid button down shirt. Has two pockets and these cute square buttons down the middle. Brand is Sarah Bentley and it's marked a size medium in women's. Material is 75% polynosic (a type of rayon that claims to be wear resistant and has a soft silky finish which it does!) and 25% polyester. Measures 20 inches pit to pit (40 inches) and it is 22 inches long. Please compare measurements to your own to make sure it fits. Used item, has been washed.