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
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。