From Megan Nielsen Patterns:
Loose fit woven blouse with optional placket and collar. Pattern features two sleeve lengths, shaping darts at the bust, partial button placket and peter pan collar.
Version 1 is a woven tee style blouse with scoop neckline and short sleeves. Version 2 is a blouse with a button placket and above elbow sleeves. Version 3 is a blouse with peter pan collar and button placket.