The elastic at the waist gives a nice snug fit.

腰间的松紧带使衣服正好紧紧贴在身上。

《牛津词典》

Right now, you’re buying clothes that are a couple of sizes too big or sticking with that old, elastic-waist skirt at the back of your closet and one of your husband’s shirts.

现在，你买的衣服只是大几码或者穿着旧的，放在壁橱最后面有松紧带的衣服或者你丈夫的衬衫。

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