User blog:Brazilianbimbo/Question!

So i recently just created my own wikia for the first time and i have a question

how do i make my square points circular?

for example http://shingekinokyojin.wikia.com/wiki/User:ⓡedstr3

See how the points of the squars are more curved?

How do you make it like that?

Please and thank you (:

Love ya, XOXO♥