Board Thread:Support Requests - Designing Your Wikia/@comment-25154254-20150425153114/@comment-4018164-20150425165950

This is the border-style styleing of the border. By default, the border is "solid". The border in that image is set to "dotted". There are 2 main ways for setting a dotted border (on this example, a 1px black border): Dotted Area! Dotted Area! They both result in: Dotted Area!

You could check the link that i've included to see the other values for your border styling.