1inch ('') = 1000mil
1mil = 0.0254mm
1206080506030402
0.12'' * 0.06'' = 3.2mm * 1.6mm0.08'' * 0.05'' = 2.0mm * 1.2mm0.06'' * 0.03'' = 1.6mm * 0.8mm0.04'' * 0.02'' = 1.0mm * 0.5mm