Get measured in a shop or thoroughly study online size guides.

在商店里做一次完全的测量或者上网寻求指导。

While study online can skip over these unnecessary stuff, people can listen to the course immediately, they just need to click on the button.

然而网上学习能够省略掉这些不必要的麻烦，人们能够马上听课，只要他们点击按钮。