A fellow Raverler and TKGA member, polycrafty, has developed a wonderful tool for knitters and other crafters who need to keep peoples measurements on hand for projects. It lists the most common measurements needed for a garment or accessory and it is business card sized so you can conveniently keep it with you in your wallet so that you know what you need while out shopping for a new project. Simply fill in the blanks with a person's measurements.
She has set it up in pdf format and is offering it for free on her blog, Unravelling Argyle. You can find a button at the top of her blog that will direct you to the pdf for the wallet cards or just click this direct link.
Bonus: She has also made up a Knitter's Sock Guide that is able to be folded up to business card size, and is also available in pdf format. You will find it available on that same page. It provides those little reminders for the heel turning, gusset, toe decreases, Kitchener stitch that we sometimes need a little help with.
I hope that you find these tools as helpful as I have. Also, I asked her permission to pass this information on to you, so please make sure to give her proper credit for a fantastic idea and for doing the work for us if you pass it on too.