Bootstrap is made to not only look and behave great in the latest desktop browsers, but in tablet and smartphone browsers too. It's packed with features; a 12-column responsive grid, dozens of components, plugins and more!.
|Label||Layout width||Column width||Gutter width|
|Smartphones||480px and below||Fluid columns, no fixed widths|
|Smartphones to tablets||767px and below||Fluid columns, no fixed widths|
|Portrait tablets||768px and above||42px||20px|
|Default||980px and up||60px||20px|
|Large display||1200px and up||70px||30px|