I trim mine down to an eighth of an inch once a week.
It doesn't take it down to an eighth though on account of the direction of the hair and the thoroughly slipshod way I do it. Probably more like 3/16ths. Hope this helps. Apologies for the delay. I just baked some bread and planted some blackcurrants.
( Dr. Shambolic Minister for Sport for Papua New Guinea, Sun 13 May 2012, 17:44, archived)

I can't deal with this devil may care imperial primping
for all I know that is the length for maintaining the sex
( glued eel /questions/questionsyoudliketoask/post1648081, Sun 13 May 2012, 17:53, archived)