Ralph Lauren gray Aran knit sweater - please read carefully

Lauren Ralph Lauren light gray shawl collar Aran knit Fishermans' style sweater in impeccable condition - however it is missing the brand/size tag as well as the fabric content tag, the only remaining tag is the fabric care tag. Since the tag is missing there is of course no 'proof' that it's Ralph Lauren, but it is, from several years ago - the care tag is the signature dark green used in Lauren Ralph Lauren clothing This is a wool, alpaca and acrylic blend knit, but since the tag is missing I can't confirm exact percentages of each fibre. Slightly fuzzy texture (not pilling, just the way the fibres are), please see close up photos. The sweater is a size S (but again, since the tag is missing I can't confirm this, so please refer to measurements below - it can work for size M as well. Armpit to armpit = 20.25 inches Shoulder to hem = 26.5 inches Sleeve length from armpit = just over 18.75 inches