If your foot points down, you need to measure the distance between the top of your big toe and an imaginary line from the bottom of your heel.
如果你的脚底朝下，那么你需要测量你的脚后跟到你大脚趾所在垂线的最短距离。
2
Gauging his distance, Kostya reared back and slammed his heel against the door.
克斯特亚估量了一下距离，拱起后背，抬脚猛踹在门上。
3
It didn't look at shoe heel height, it looked at anatomical heel length, the distance from the back of your ankle joint to the insertion of the Achilles tendon.