H&M Gray Cardigan Size Medium? Patch Pockets Long Sleeve

H&M cardigan 2 small patch pockets, 5 buttons, long sleeves Ribbed knit details at neckline, placket, hem, cuffs and pocket * worn flaw condition 2 holes were mended 1. Right bottom pocket 2. Left bottom Shown in photos * no size on label guessing it fits like a medium? Flat lay measurements Pit to pit 20.25” Sleeve 21” Centre back 26”