"여자는 키가 큽니다."

Translation: The woman is tall.

[LiKenun]

Literally: “The woman… height is big.”

는 is the topic marker. I'm this case, the topic is the woman.

가 is the subject marker. The subject here is height.

This sentence is stating something about the height in relation to the woman. So while 는/은 and 가/이 are used interchangeably in some cases, this is one where they are used with their finer nuances.

[KilikiCL]

고마워요!

[Gaming4Gir]

감사합니다!!!

[Yoongi66507]

She's tall, does she also wear size 13 Nikes...men's size 13 Nikes?

[eyaramos]

What does 키가 and 큽 means?

[sakihhanajima]

키 means height, 가 is the adjective particle, 크다 (dictionary form) means to be big, and (읍)습니다 conjugates the word to formal polite form.

[xFioramaster118]

Wow, that was a really thorough explanation! Thanks

[n5xX3]

I am Korean and exactly 'the woman is tall' is right

[yua.okazaki11]

라리사 키가 큽니다

[Andrew-Lin]

The sentence structure is similar to Japanese:
女子は 背が 高い。

[Zeragon1]

I wrote "the woman is tall" and got another translation "the woman is tall" 0_o