JR Screen Ruler

<fieldset>This Screen Ruler is a great tool that allows you to accurately measure anything on your screen. This is especially useful when measuring graphics, web page browser sizes or whatever. Screen Ruler can display Pixels, Inches, Picas or Centimeters. </fieldset>

Perfecto para medir desde el navegador.

http://www.spadixbd.com/freetools/JRuler.gif

ENLACE