NWT YMI Girls/Juniors Sz M Sandwhite Plaid (Cream/White & Tan) Button Down Shirt

NWT YMI Girls/Juniors Sz M Sandwhite Plaid (Cream/White & Tan) Button Down Shirt I’m not sure if this is a junior’s size or an adult’s size. I’m learning towards junior’s but please message sage me with any sizing questions. In pretty good condition. Still has the tags. Some small, faint blue marks on the back. Please see pictures for more information. Does not impact wearability.