Here is one of the questions from the famous test : "Are you a ÜPEG?". Anyone who lost his eyes above a printed circuit board, soldering or unsoldering a few dozens of SMDs, knows pretty well this logic sequence. Some metric system extremists have tried to replace these good old mils by millimeters, but let's admit it, this sequence would lose everything: 503, 1005, 1808, 2012, it's ugly, isn't it?
By the way, the answer is obviously 1206, or even "A", if you swap the scale...

Black tee-shirt 100% coton (190 grams), with the SMD Fibonacci numbers printed on the front, and the "Engineered by ÜPEG" logo in the back below the neck.