Taken with a 250d, 500d, +4, +2, +1 - close ups, stacked. Used a halogen light, and placed this really old microchip on a tray from an old microscope so I could adjust everything very finely. The width is 5mm - length is 6mm.

To see a closer view look at Gated Community in Silicon Fields the other chip picture. I have it zoomed on that large square looking thing.