See how aspects of the Bootstrap grid system work across multiple devices with a handy table..

For example, here are two grid layouts that apply to every device and viewport, from xs to xl. Add any number of unit-less classes for each breakpoint you need and every column will be the same width.

Auto-layout for flexbox grid columns also means you can set the width of one column and have the sibling columns automatically resize around it. You may use predefined grid classes (as shown below), grid mixins, or inline widths. Note that the other columns will resize no matter the width of the center column.

Use col-{breakpoint}-auto classes to size columns based on the natural width of their content.

Create equal-width columns that span multiple rows by inserting a .w-100 where you want the columns to break to a new line. Make the breaks responsive by mixing the .w-100 with some responsive display utilities.

Bootstrap’s grid includes five tiers of predefined classes for building complex responsive layouts. Customize the size of your columns on extra small, small, medium, large, or extra large devices however you see fit.

All breakpoints

For grids that are the same from the smallest of devices to the largest, use the .col and .col-* classes. Specify a numbered class when you need a particularly sized column; otherwise, feel free to stick to .col.

Using a single set of .col-sm-* classes, you can create a basic grid system that starts out stacked and becomes horizontal at the small breakpoint (sm).

Don’t want your columns to simply stack in some grid tiers? Use a combination of different classes for each tier as needed. See the example below for a better idea of how it all works.

Gutters can be responsively adjusted by breakpoint-specific padding and negative margin utility classes. To change the gutters in a given row, pair a negative margin utility on the .row and matching padding utilities on the .cols. The .container or .container-fluid parent may need to be adjusted too to avoid unwanted overflow, using again matching padding utility.

Here’s an example of customizing the Bootstrap grid at the large (lg) breakpoint and above. We’ve increased the .col padding with .px-lg-5, counteracted that with .mx-lg-n5 on the parent .row and then adjusted the .container wrapper with .px-lg-5.

Use flexbox alignment utilities to vertically and horizontally align columns. Internet Explorer 10-11 do not support vertical alignment of flex items when the flex container has a min-height as shown below. See Flexbugs #3 for more details.

Vertical alignment

Create equal-width columns that span multiple rows by inserting a .w-100 where you want the columns to break to a new line. Make the breaks responsive by mixing the .w-100 with some responsive display utilities.