Wow, what a great idea! You knit the “pieces” but no sewing required! This is so easy to do, even beginners like it! Started at the back, and then knit fronts, then sleeves. Just weave in yarn ends and you are done! Sizes from 40” to 52”. Uses worsted weight yarns, and you can do like we did and use up scrap yarns of colors for perky stripes! You will need knitting needles, US # 8 and # 10, in circular lengths of 16” , 24” and 36”. Also an 11 inch circular or double points to work the sleeves. This is rather fun to tell people you knitted the whole sweater without sewing one seam! You can make this either for men or for women by changing buttonhole sides. For women, buttonholes are on right side, for men on left side. (that is the side as the garment is worn).