Drill Bit Number 30 is a standard size.
#30 = 0.1285 inches = 03.2639 mm
Therefore, 0.1285 is between 1/8" and 9/64", but closer to 1/8"
for other sizes, visit:
http://www.ndrr.com/rmr_faq/Tools_an...rill-Sizes.htm
double-check at:
http://www.madison.k12.wi.us/toki/codrills.htm#1/8
christopher