The bottles are both of a size.

这两个瓶子大小相同.

《简明英汉词典》

They're both of a size, ie are the same size.

这两个大小相同.

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All the boys are much of a size.

这些男孩个头差不多一样.

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The two were very much of a size.

两者尺寸几乎完全一样.

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Hence banna is a traditional administrative division of a size between today's prefecture and county.

因此,“版纳”是一种旧行政区划的名称,介于现在的区、县之间.

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