Thnaks to Dawna for this one...

Buford and Festus were standing at the base of a flagpole, looking up. A woman walked by and asked what they were doing.

"We're supposed to find the height of the flagpole," said Buford, "but we don't have a ladder."

The woman took a wrench from her purse, loosened a few bolts, and laid the pole down. Then she took a tape measure from her pocket, took a measurement, announced, "Eighteen feet, six inches," and walked away.

Festus shook his head and laughed. "Ain't that just like a dumb blonde!

We ask for the height, and she gives us the length!"