5. The fit isn't good.
尺寸不太合适。
还能这样说：
It's the wrong size.
The size doesn't fit me.
6. Try it for size.
试试它的大小合不合适。
还能这样说：
Try this on for size.
Try it on and see if it fits you.
7. This one is a better fit.
这件大小挺合适的。
还能这样说：
This is the right size.
This one fits me well.
应用解析：
by/in fits and starts 一阵一阵地。
例如：I can only do my homework in fits and starts because the baby is crying.
因为小孩一直哭，所以我只能断断续续地写作业了。
8. It's too big for me.
我穿着太大。
还能这样说：
It's too loose for me.
It's too large for me.
应用解析：
be big on 喜爱；
go over big 大受欢迎，非常成功；
look big 摆出一副了不起的样子；
make big 取得显著成就，飞黄腾达；
talk big 说大话，吹牛