A. Have you already seen a bison?

No, I haven't seen a bison.​(Punctuation)

​

B. It's okay?

=> Another way: Your sentence is okay and this is another way of saying it.​

How does it fit? 

It's small to me.

=> Another way: Your sentence is okay and this is another way of saying it.​​

It's too small for me. 

Is it a little small?

=> Another way: Your sentence is okay and this is another way of saying it.​

A little bit small?​