Factoria Perez Alpaca Wool Sweater No Size Tag-Possibly Medium? See Measurements

Factoria Perez Baby Alpaca Wool Sweater. Made in Peru. Buttons Closed. There is No Size Tag or Care Tag but I would guess that it is Possibly around a size Medium? I’m listing it as a medium but I could be wrong with my guess in size so please see my rough approximate measurements. I normally wear a small and have modeled it in some of the pictures-I feel the fit is a bit loose on me but I would wear it except the sleeve length is too short for me. This is in good used condition. There may be signs of wear and minor imperfections since it isn’t new and has been worn. Measurements are rough approximate measurements and colors may be off in pictures because of lighting.