It ain't practical unless you got Six fingers, lima oscar lima. However hexadecimal has an older more universal appeal.
When I'm finger-counting base twelve I use the thumb as the counter. It's done on the outside of the hand and starts with the thumb on the tip of the index finger for one, to the first knuckle for two to the second knuckle for three, to the tip of the middle finger for four, etc.
I still don't do it very much. Naming would be simple enough if I did:
1 one
2 two
3 three
4 four
5 five
6 six
7 seven
8 eight
9 nine
A ten
B eleven
10 onety
11 onety-one
12 onety-two
.
.
.
A0 tenty
A1 tenty-one
.
.
.
B0 eleventy
B1 eleventy-one
.
.
.
BB eleventy-eleven
.
.
.
I'm more likely to count base sixteen, though. I do it whenever the local County Legislature has a vote in one of their meetings. It takes eight ayes to pass a measure, regardless of how many are attending the meeting and that comes out to reaching the tip of my ring finger. I use the right hand for ayes and the left hand for nays.
