Do you mind if I try this on？
The changing rooms are over there.
试衣间在那边。It's a little tight.
有一点紧。
It's not such a good fit.
不是很合身。Can I try the next size up？
我可以试大一号的吗？I'm not so sure about the color.
我不确定我是不是喜欢这个颜色。It doesn't go with your skirt.
这个跟你的裙子不配。I think the color itself is fine.
我觉得这颜色本身是不错的。