The poncho is knitted from the shoulder, then around the body and back to the shoulder, and finally joined together with kitchener stitches. It is worked entirely in stockinette stitch with one strand of mohair or kid-silk.

Small-Medium (Large-XLarge) after blocking
Small-Medium= length 36cm, shoulder circumference 80cm
Large-XLarge= length 41cm, shoulder circumference 84cm

The poncho from the picture is knitted in DROPS kid-silk in the color 70 Bordeaux