Clarification for the Big Book of Socks

A knitter contacted me because she was having some trouble with the foot measurements for the short-row heel sock patterns in The Big Book of Socks. It took a few messages to sort out where the problem was, but together we figured out the confusion. Just in case anyone else is having the same trouble, I would like to emphasize that all foot measurements in the instructions are to be measured after the heel is finished. Measure the foot for flap and gusset heel socks from the gusset edge, and measure the foot for short-row heel socks from the first full round after completing the heel.