Madewell Sadler Turtleneck Sweater size small. Reason #1,000 why we love sweater weather: this turtleneck. Knit in a charming mixed stitch from a buttery-soft merino wool blend, it's cropped (for maximum styling possibilities) with an easy boxy fit. The style you'll be reaching for all season. Boxy, cropped fit. Body length from high point of shoulder: 19 3/4" (based on size M). Nylon/merino wool/polyester/acrylic. Machine wash.