Label RituKumar embellished tunic top, size 3

Label RituKumar embellished tee in blue, black, and gold, with gold sequins. This garment gave me a little trouble trying to figure out the sizing. The label says 3, but their website doesn’t list that as one of their sizes. Using the pit to pit measurement - which is also unusual as the arm openings are actually along the top of the garment when it’s laying flat - it appears that the closest match is a size Medium. There is a screenshot from the company’s website of their sizing chart. 100% viscose exclusive of decoration Hand wash cold All measurements are approximate and are taken while the garment is laid flat. Hem to shoulder 25.5” Hem to neckline 23” Pit to pit 21.5” Sleeve from armpit seam if applicable n/a