If you want to adjust the size of your browser window, you can easily do so with the Resize Me application. This extension for Chrome allows you to modify the height, pad height, width, and pad width of a window. After installing the extension, you can click on the icon and manually input your desired dimensions.

Notes:

• There is currently an issue wherein if a full-screen window is on one monitor (often the 'main' monitor), the resize will not take place. You can get around this by moving it to the other monitor or resizing it so it's not full screen.
• The current values you will see may be a bit different due to the toolbars, bookmark bars, and scroll bars changing the visible window. You can change the padding values to account for this inconsistency.