Creating border around the middle section of Site

So my goal is to create a border around my site. I don't want the border going around the enitre body of the site, just around the middle section. To get an idea of what I'm talking about, my site is https://www.bendisskin.com. I want the border going around the white section that is in the center of the page. Anyone know where I can make that fix?

Depending on exactly what you seek try adding each these seperately to your stylesheet adjust as desired

#indexDefaultMainContent {
border: 2px solid #000000;
}
#indexDefault {
border: 2px solid #000000;
}

It does create a border, but only around the Picture and content on the main page rather than around that content, plus around the header, and the side boxes, and the footer. Any other suggestions?

I don't want the border going around the enitre body of the site, just around the middle section.

I want the border going around the white section that is in the center of the page.
That is what I thought you wanted???
around that content, plus around the header, and the side boxes, and the footer
I see you figured it out...