A nickel for your HO scale thoughts

I mentioned to Martin this old post on using a Canadian nickel as a cheap-and-cheerful approximate scale for an HO-scale human. He quickly pointed out that an English 20 pence coin is about the same size. I went and rooted through my coin box and found one of those coins as well as a US nickel. And presto! A tri-country HO-scale translator :-) I need to find other suitably sized coins from the many countries where HO might be spoken to make this a truly universal translator, but I don't think the fine people at Google Translate have any worries about losing their market :-)