These don't fit.  I need a bigger size.这些不合适。我要大一号的。

　　A    Can I also see those red shoes， please？

　　A    我能看看那双红色的鞋吗？

　　B    Certainly.  Here they are.  We also have them in other colours.

　　B    当然。给您。我们还有其他颜色的。

　　A    Oh . . . these are a bit tight.  I think they're too small.

　　A    哦。 . .这双有点挤脚。我想它们太小了。

　　B    Are you sure？  I can get you bigger ones.

　　B    你肯定吗？我可以给您拿大一号的。

　　A    Yes.  These don't fit.  I need a bigger size.

　　A    是的，它们不合适。我需要大一号的。

　　B    OK.  One moment， please.

　　B    好的，请稍等。

　　Notes                        注释

　　1 If something is too small， e.g. shoes， a jacket， a t-shirt， you can ask for a bigger size / a bigger size， e.g.： I need a bigger size / I need a bigger size.如果某物太小，例如鞋子，上衣，体恤衫，你可以要a bigger size /大一号的，例如：I need a bigger size / 我要大一号的。

　　2 Remember also， when something doesn't fit， there are several ways of expressing this， e.g.： This doesn't fit me / This doesn't fit me： It's too small for me / It's too small for me： It's the wrong size / It's the wrong size.也请记住，当某物不合适时，可以用几种方法来表达，例如：This doesn’t fit me /这件不适合我。It's too small for me / 我穿太小了： It's the wrong size /号码不对。