Here are two designs in three sizes: crib (24" x 36"), blanket (34' x 36"), and afghan (48" x 60"). This pattern includes instructions and yardage needed for doing these two designs in five gauges (6, 5.5, 5, 4, 3.5 stitches = 1".
Pick out the yarn and the design that you want. Make a swatch using the needle size that is recommended by the yarn or the needle that will give you the desired fabric and check the gauge. Pick out the size you want. the chart will tell you how much yarn is needed and how many stitches to cast on. Follow the directions for the design. NOTE: sometimes a larger needle gives your finished product a softer feel.