Resize the window to see the detected size below adjusts.

Detected size is:

Source files:

• index.html (this file)
• javascripts/mq-shim.js
• stylesheets/sass/mq-disabled.sass
• stylesheets/sass/mq-enabled.sass
• stylesheets/sass/layout/_base.sass
• stylesheets/sass/layout/_320.sass
• stylesheets/sass/layout/_480.sass
• stylesheets/sass/layout/_640.sass
• stylesheets/sass/layout/_960.sass
• stylesheets/sass/layout/_1120.sass

Resulting CSS:

• stylesheets/mq-disabled.css
• stylesheets/mq-enabled.css

Read the related blog post on IE, Media Queries and SASS by Ryan Townsend