Vintage Peggy Martin open cardigan

Vintage Peggy Martin long open cardigan. No size label but I would guess it to be a size M; however, use the following measurements: armpit to armpit measured across the back = 19"and length = 32" Navy knit with black ribbed knit on bottom of sleeves and down the front. It appears to be all wool or a wool blend. Sweater is in wonderful vintage condition with some slight pilling.