`s, or nearly any other element.
{{< example >}}
Example label
Another label
{{< /example >}}
## Form grid
More complex forms can be built using our grid classes. Use these for form layouts that require multiple columns, varied widths, and additional alignment options. **Requires the `$enable-grid-classes` Sass variable to be enabled** (on by default).
{{< example >}}
{{< /example >}}
## Gutters
By adding [gutter modifier classes]({{< docsref "/layout/grid#gutters" >}}), you can have control over the gutter width in as well the inline as block direction. **Also requires the `$enable-grid-classes` Sass variable to be enabled** (on by default).
{{< example >}}
{{< /example >}}
More complex layouts can also be created with the grid system.
{{< example >}}
{{< /example >}}
## Horizontal form
Create horizontal forms with the grid by adding the `.row` class to form groups and using the `.col-*-*` classes to specify the width of your labels and controls. Be sure to add `.col-form-label` to your `
`s as well so they're vertically centered with their associated form controls.
At times, you maybe need to use margin or padding utilities to create that perfect alignment you need. For example, we've removed the `padding-top` on our stacked radio inputs label to better align the text baseline.
{{< example >}}
{{< /example >}}
### Horizontal form label sizing
Be sure to use `.col-form-label-sm` or `.col-form-label-lg` to your ``s or ``s to correctly follow the size of `.form-control-lg` and `.form-control-sm`.
{{< example >}}
{{< /example >}}
## Column sizing
As shown in the previous examples, our grid system allows you to place any number of `.col`s within a `.row`. They'll split the available width equally between them. You may also pick a subset of your columns to take up more or less space, while the remaining `.col`s equally split the rest, with specific column classes like `.col-sm-7`.
{{< example >}}
{{< /example >}}
## Auto-sizing
The example below uses a flexbox utility to vertically center the contents and changes `.col` to `.col-auto` so that your columns only take up as much space as needed. Put another way, the column sizes itself based on the contents.
{{< example >}}
{{< /example >}}
You can then remix that once again with size-specific column classes.
{{< example >}}
{{< /example >}}
## Inline forms
Use the `.col-auto` class to create horizontal layouts. By adding [gutter modifier classes]({{< docsref "/layout/grid#gutters" >}}), we'll have gutters in horizontal and vertical directions. The `.align-items-center` aligns the form elements to the middle, making the `.form-checkbox` align properly.
Be sure to always include a `` with each form control, even if you need to hide it from non-screenreader visitors with `.sr-only`.
{{< example >}}
{{< /example >}}
{{< callout warning >}}
### Alternatives to hidden labels
Assistive technologies such as screen readers will have trouble with your forms if you don't include a label for every input. For these inline forms, you can hide the labels using the `.sr-only` class. There are further alternative methods of providing a label for assistive technologies, such as the `aria-label`, `aria-labelledby` or `title` attribute. If none of these are present, assistive technologies may resort to using the `placeholder` attribute, if present, but note that use of `placeholder` as a replacement for other labeling methods is not advised.
{{< /callout >}}