Not wrong, no. Come by my place after work and I'll do some measurements? Might take me awhile, since I'm gonna use the one I make for me as a sort of 'proof of concept' to see if I can crotchet something that requires actual fitting.

If you don't mind waiting though, I'll totally make you one. What colour do you want? You could totally rock a bright yellow, you know. Something like this: http://www.artyoucan.com/content/products/images/792_1kg-art-silk-yarn-recycled-crochet-knitting-yellow_1368.jpg

Hmm, what about this blue? http://img2.etsystatic.com/000/0/5695516/il_fullxfull.162986086.jpg