This highlighter tape by Lee Products is 1/2" wide and has a 393" of tape per roll. It is reusable - its stickiness is similar to that of a Post-It note. But unlike a Post-It note, it won't fall off the page halfway through your project. We find that one piece can last long enough on a pattern chart to complete a whole project; even a larger one like a sweater or shawl!
This tape was originally designed for educational market to help students track their lines while reading; this help knitters and crocheters keep track of the row they are on while being able to see the rows above and below because this colored tape is transparent. We think that without a doubt, most knitters and crocheters will find a use for this product!