This is a vintage WWII era Vogue 9350 sewing pattern from 1942 for a collarless blouse with long bishop or short sleeves. The blouse has gathers at each side of the banded collar in front and it buttons at the back of the neck.
Cut, unprinted complete pattern.
There is some writing on envelope.
Keep in mind that most patterns are adaptable to accommodate a range of sizes, so be sure to check out the tutorials available online!