In order to convert a sweater into a sporty strapless dress you will need the following materials: a sweater, some white chalk (or something washable to make markings with), a scissors a table (or workspace of some sort), and a sewing machine. To start lay the shirt out flat on the table. Then make markings using the chalk in the style of a dress. (About 2-3 inches from the edges and fan out at the bottom.) Then measure the marks on your body and make sure they line up with your sides. After this, cut out the marked dress section. Hold the two pieces together with pins and begin sewing the two sections together. You now have a tube dress. To make a matching jacket, take the two arms you cut off of the sweater and line them up flat on the table, cut-end to cut-end. Then sew them together where the ends meet in the back to form the jacket.