average cost of sweater
1 Enough yarn for a sweater can cost $30-$50 or as much as $200-$300 or more. 2  The Craft Yarn Council of America gives free tips for getting started and the online magazine Knitty offers helpful articles and free patterns. Crocheting requires about one-third more yarn than knitting, and the cost of yarn is usually the largest expense for any project. 2  Inexpensive acrylic yarn starts around $2-$4 a package; higher-quality acrylics and wool can run $5-$18 each; and some imported or rare yarns can be $20-$40 or more per package.