size作为尺寸的时候要大写吗

不需要大写，除非用在句首

例句：

Each recipe specifies the size of egg to be used.每种菜谱都具体规定了所用鸡蛋的大小。

The piece was reduced in size by planing down the four corners.这块木头的4个角刨过后就变小了。

The once-powerful post unions have been cut down to size.

一度很强势的邮政联盟已经威风不再。

I would class my garden as medium in size.我的花园只能算是中等大小。

The new planet is about ten times the size of the earth.新发现的行星大约是地球的10倍那么大。

The size of the fish will determine the thickness of the steaks.鱼的大小决定鱼排的厚度。