I need a pizza in medium size.

我需要一个中号的披萨。

Do you have these shoes in medium size?

这双鞋子有中号吗？

I bought a T-shirt in medium size.

我买了一件中号的T恤。

This hat is medium size, and it fits me perfectly.

这顶帽子是中号的，正好适合我。

This dress is only available in medium size and large size.

这条裙子只有中号和大号。

According to the size chart, I should choose a medium size.

根据尺码表，我应该选择中号。

Let try on the medium size.

我试一条中号的吧。

Do you want a large size or a medium size?

您穿大号的还是中号的?

The medium size fits her nicely.

她穿中号很合身。

The blue cap is a medium size.

那顶蓝色的帽子就是中号的。