Bead Size for Reference

I label all the beads I sell by mm. Lists below are for reference and may not be the exact size. 

mm to inches
2mm = 0.078 740 157 48 inch
3mm = 0.118 110 236 22 inch
4mm = 0.157 480 314 96 inch
5mm = 0.196 850 393 7 inch
6mm = 0.236 220 472 44 inch
7mm = 0.275 590 551 18 inch
8mm = 0.314 960 629 92 inch
9mm = 0.354 330 708 66 inch
10mm = 0.393 700 787 4 inch
11mm = 0.433 070 866 14 inch
12mm  = 0.472 440 944 88 inch