Note: Depending on the types of project you have in mind, you would purchase a cake if you had a small project, a skein if you were making a vest or socks, or a Jumbo if you had in mind a sweater or jacket. Your pattern will give you the appropriate yardage needed for what you would like to make. Sweater knitters sometimes really like the fact that their yarn is all in one skein and there would be fairly few (to sometimes no) breaks in the yarn.