Off Topic: Useful, Perhaps
Working on projects here and in Japan, I’m always bouncing back and forth between imperial and metric (btw, metric is so much better – too bad we Americans don’t have much of an intuitive feel for it). Google converts the numbers for me, but I always have trouble visualizing the differences. So, here’s a chart showing relative sizes and a few actual differences, with some silhouettes of popular, large things for scale.
And scroll all the way down for a truly magnificent comparison of feet and inches.
Magnificent, I say!