A third of a yardstick.
It's not technically 1-foot long, so try again.
...Clever wee bastard
'Scuse me? A yardstick (a good one, at least) is 3 feet long. And that's not counting the extra length on the ends, because a good yardstick should not have that.
1/3 of 3 is 1.
1 foot.
I win.
And, failing that, Subway's $5 footlong.