크기는

크기는

"크기는" means "size" or "volume."

Here, '크기는' is used to refer to the size of the park, emphasizing the attribute being discussed.

공원의 크기는 아주 큽니다.

The size of the park is very large.

In this sentence, '크기는' specifies the dimension of the box, integral to its appropriateness.

그 박스의 크기는 맞을지 모르겠어요.

I'm not sure if the size of that box will be suitable.

'크기는' is employed to denote the comparative size being discussed, highlighting its relative attribute.

좀 큰 크기는 더 비싸더라고요.

A slightly larger size is more expensive.