Vintage polka dot button down tank top

Vintage Simply Basic white button down tank top with red polka dots. There are 7 buttons down the front. It has one pocket on the left chest and a hang tab at the center back. Bottom is curved. Writing on tag has been washed off so size unknown. Please refer to measurements provided to ensure an accurate fit. All measurements are approximate and taken laid flat: Front from armpit to armpit 19.25” Waist 19” Top of shoulder to hem 26”