Patchwork blankets used to be made from scraps of fabric left over from previous sewing projects. Although some were intricate and complex, others could be a simple patchwork design. When selecting fabrics for your blanket, choose 100 per cent cotton fabrics in complementary colours. You can make patches all out of one fabric, or you can make them out of fabrics with different colours and designs. Pre-wash the fabrics to prevent the colours from running together after being sewn into the blanket and to prevent the blanket from shrinking.
Measure a block 18 inches wide and 22 inches long on a piece of cardboard. Cut the block out with a pair of scissors. This will be your template when cutting out patches for the blanket.
Place the template on the fabric and trace around the template with tailor's chalk. Cut out the patches from the fabric. Cut 12 patches from one fabric and 12 patches from another fabric to create a multicoloured design.
Arrange the patches in rows. Place six patches in a row with a total of four rows. Arrange the patches in a pattern, such as alternating the colours every other patch.
Pin each patch together lengthwise. Pin each patch to the patch next to it by facing the right sides together and pinning along the edge. Sew each patch to the next with a 1/4-inch seam. Press the seams open.
Pin each row together widthways. Pin each row to the next row by facing the right sides together. Sew each row together with a 1/4-inch seam. Press the seams open.
Cut a piece of batting the exact width and length of the unfinished blanket. Pin the batting to the back side of the blanket. Stitch a stay stitch around the blanket about 1/4 inch from the edge.
Cut a large piece of fabric the exact width and length of the unfinished blanket. This will be the backing for the blanket. You can cut it from the same fabric used to make the patches or a different one. Pin the backing to the blanket with the right sides together.
Stitch the front and back of the blanket together. Stitch a straight stitch about 1/2 inch away from the edge. Stitch only three sides of the blanket and leave one seam open. Turn the blanket right side out and stitch the open seam closed with a slip-stitch.
The "right" side of the fabric is the front of the fabric with the printed design. In many plain cottons, there is not a right or wrong side so use any side when cutting the patches.