Border Question.

Before the "Ugh, did you look in the memories?" statements come, I'd just like to say, that yes. I have looked and I sadly couldn't find anything. :/ hmph.

Anyways, I'm wondering how the borders on the top and bottom of this icon are achieved.

by findme_icons

I'm thinking it's maybe a brush or textures, but I'm not sure.

Thanks in advance. :)