I made one of these customised tape measures for my BT pal. A friend saw it and wanted some for her business. I spent my evenings last week finishing these guys off. They're retractable tape measures. Approximately 50mm in diametre and have a tape that's 1.5metres long and measures both centimetres and inches.
If anyone's interested in buying one similar to the ones you see here contact me and we can work out the details. As I mentioned on flickr they're USD$14 each plus postage or USD$28 for two including postage to anywhere in the world (one address).