I have a little measuring tool that I keep by my sewing machine all the time. I was just checking out my e-mail from Fabrics.com and they have this same little measuring tool on sale right now for...get ready....for >28 cents! Bet you didn't know you could get anything for 28 cents anymore. Check it out. It is just called Measuring Tool. Stock # is NR-460.
It will be interesting to see what your favorite little tool is.