Show Window Size is a free Chrome add-on developed by bugbebop. It falls under the category of Browsers and is specifically categorized as an Add-ons & Tools subcategory. This small widget is designed to display the inner size of a window, providing users with accurate measurements.

The add-on offers various customization options, allowing users to adjust the opacity, font size, and default position of the widget through the options page. Additionally, the widget is movable, allowing users to easily position it wherever they prefer on the screen. If the widget gets lost within a web page, users can simply click the "Set to Center" button to quickly locate it.

Overall, Show Window Size is a handy tool for those who frequently need to measure the inner size of windows. With its customizable features and ease of use, it provides a convenient solution for window measurement tasks.