Sizer is a freeware application that will size almost any Windows application to a predefined windows size with just a few clicks.

Why use Sizer?

Sizer is especially good for web designers who test sites to see if they can be seen properly using a certain resolution without adjusting the Windows display settings.

Even if you’re not a designer, if you have certain applications that don’t require full-screen use, Sizer is a great way to resize app windows quickly and easily.

The way to use Sizer is simple. Right-click any title bar or minimized application in the taskbar. Choose the predefined height-x-width, left click and the window will resize to those dimensions exactly.

Like this:

For those wondering, yes you can make as many predefined settings as you like. For example, I have one for Chatzilla, an IRC application. Being that I like my chat app a certain size I have that as a setting I can click. For the rest they’re simple width-x-height.