Let's establish length vs width first: The width is the number of stitches you have on your needles. The length is the number of rows you have, it's the part that wraps around you. To make it longer and not wider add 2 more knitted rows, like this: Row 1: KFB Row 2: *K* Row 3: *K* Row 4: *K* Row 5: *K* Row 6: *K* Row 7: KFB *K* Repeat rows 2-7 until desired length.