100% Peruvian Link Alpaca Purple Sweater Made in Peru Size M?

Very gently used and very soft! Two front pockets. We're guessing a size medium with approximate measurements: underarm to underarm across 20"; back of neck to bottom: 26"; shoulder to shoulder across: 16"; underarm to cuff: 14" YOUR PURCHASE BENEFITS A 501©3 NONPROFIT ORGANIZATION THAT SUPPORTS HEALTHCARE. THANK YOU!