For me, it's not long enough for use on a 12x12 scrapbook page. Ok for 8'. If there is a way to use it on bigger pages, I have not found it yet. But Im working on that.
So as far as a grade on this, heck, buy it. I got it on sale so Im not out but 6$. I guess it's worth that much. But next time I'll go back to my foam pads I bought elsewhere, they worked almost as well, except there is no measurements on them.