简单，我刚刚发现了这个。

https：//graph.facebook .com / friends_Id / picture？width = 200& height = 200

tada〜

Using Graph API I can get small, large, medium pictures. Or I can get small square picture.

But how can I get large square picture? Is there any service I can use?

Simple, I just found this out.

Example,

https://graph.facebook.com/friends_Id/picture?width=200&height=200

tada~