Pendleton washable wool button down shirt size small

Pendleton washable wool button down shirt size medium but fits like a small. I believe it has been washed and this happened. I have listed it as a small because of this but the tag reads medium. Please check the measurements below to ensure a happy transaction. Maroon plaid. Approximate measurements Not Exact: chest flat measure approx. 20.5 in. back length approx. 28.25 in. sleeve length from collar approx. 29.5 in. shoulder width at seams approx. 18.5 in. Smoke free, pet free home, Fast shipper gorpcore, outdoorsy, backpacking, travel, outdoors, fall, winter, casual, fishing, ski, snow, hiking, adventure