Take one tape measure and one large supermarket. Combine the two and the answer will be yours. :)
Yes, I know it's not strictly an answer, so ABEd, if you wanna get rid of this one for changing it to unanswered, go ahead. But I've searched the 'net for a while based on my assumption that it'd be a really unlikely thing to find, and can't find anything useful. If, of course, any ABers work in a breakfast cereal packing plant then I shall bow to their greater knowledge, take myself henceforth and never darken these hallowed portals again... Oh OK. I'll be back tomorrow then ;)