How to align the borders of the footer widgets for both upside and downside

Hi there,

You may see my blog as follows;
http://www.purenish.com

There are three columns on the footer. Respectively, in the first Instagram, in the second facebook and lastly in the third one twitter is positioned.

But as you see, the window of twitter is not on the same position as the others are.

Are there any ways to make them all have the same heights and widths?

Thanks in advance…