Ralph Lauren women’s black and white check ruffled shirt medium

Adorable Ralph Lauren black-and-white checkered shirt with ruffle down the center in nice condition. I don’t see any flaws on the outer portion. The color is very nice and not faded. There might be something written on the side of the collar.(10?) I zoomed in on it. the tag for the size is missing. I’m guessing it’s about a medium. I took measurements.