> こんな、少女と言って **いい歳** の女の子が殺し屋だと？

I'm wondering if there is an omitted particle between the bolded いい and 歳 of
the above sentence, which is the last sentence in the provided context below.

Context: Narrative character is thinking about another character named "Ein"
(Ain in katakana).

> アインの歳は幾つだろう？ たしかに大人びた印象はあるが、どう見てもまだ子供だ。こんな、少女と言って **いい歳** の女の子が殺し屋だと？

I can infer the いい is most likely connected to the 言って as 言って is being quoted
with the と particle; and the 歳 is connected to の女の子. Is there an omitted
particle in the above sentence; and if there isn't, what is occurring in the
bolded section of the sentence?
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2019-10-01T04:40:19.373
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question
particles reading-comprehension quotes
Is there an omitted particle between the いい and 歳 in the following sentence?
There is no omitted particle. 少女と言っていい ("where it's good to say girl"; "safely
called a girl") is a relative clause that modifies 歳 ("age").

  * 大人と言っていい人  
a person who you can call an adult

  * 少女と言っていい歳  
an age which you can call a shōjo('s age)

As for the difference between 少女 and 女の子, 少女 is a relatively literary word for
a girl roughly between 8 and 17. 女の子 also includes female babies, and
sometimes young female adults roughly up to 30, too (like the [recent use of
女子](https://japanese.stackexchange.com/a/57676/5010)).
CC BY-SA 4.0
2019-10-01T05:13:43.257
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2019-10-01T05:21:48.787
2019-10-01T05:21:48.787
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answer