Two floats with 50% width and 1px border
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <title></title> <style type="text/css" media="Screen"> body { max-width: 800px; } div { min-width: 100px; } * .ex2 { float: left; width: 50%; border: 1px solid; background: blue; } </style> </head> <body> <div class="ex2"> Float1 </div> <div class="ex2"> Float2 </div> </body> </html>