为了确保舒适度，她测量了自己的腰围。

She measured her ___girth to ensure the dress would fit comfortably.

测量这棵古树的周长需要三个人手拉手才能环抱。

It took three people holding hands to measure the ___girth of this ancient tree.

马鞍的肚带有点松了，需要重新系紧。

The saddle's ___girth is too loose and needs tightening.