Took the survey, and it made me realize I'd never bothered to register an account here before now. The situation has been corrected.

If I were doing it I'd just scan an image of my hand in at a high resolution and then use measurement tools in Photoshop or something similar. Should even be possible to do in MS Paint by taking pixel coordinates and doing a little trigonometry. It's the ratio that's important, so it shouldn't matter if the measurements are denominated in pixels or inches.

(I didn't do this on my survey because I took it at work.)