My arm span is exactly equal to my height.

我的臂展确实等同于身高。

Pulls them at arms span length and then he's repeatedly doing that but he puts his finger between to make sure the strands don't stick together.

张开手臂拉长面团直到与双臂等长，然后他重复这样做，但是他把手指放在中间，以确保这些面不会粘在一起。