Stacks

Labels inform users what information is being asked of them. They should be written in sentence case.

For usability reasons, if a label is connected with an input, the for="[id]" attribute should be filled in. This attribute references the input’s id="[value]" value. This makes clicking the label automatically focus the proper input.

Base style

<form class="grid gs4 gsy fd-column">
    <label class="grid--cell s-label" for="question-title">Question title</label>
    <div class="grid ps-relative">
        <input class="grid--cell s-input" type="text" id="question-title" placeholder="e.g. Why doesn’t Stack Overflow use a custom web font?"/>
    </div>
</form>

Sizes

Name	Size	Class	Example
Small	12px	`.s-label__sm`	Question title
Default	15px	N/A	Question title
Medium	17px	`.s-label__md`	Question title
Large	21px	`.s-label__lg`	Question title
Extra Large	27px	`.s-label__xl`	Question title

Status

When you need to flag labels as required or optional, use the following flags. Use the full word "Required" or "Optional" for these flags instead of using asterisks.

Optional

<form class="grid gs4 gsy fd-column">
    <label class="grid--cell s-label" for="question-tags">Question tags <span class="s-label--status">Optional</span></label>
    <div class="grid ps-relative">
        <input class="grid--cell s-input" type="text" id="question-tags" placeholder="e.g. Why doesn’t Stack Overflow use a custom web font?"/>
    </div>
</form>

Required

<form class="grid gs4 gsy fd-column">
    <label class="grid--cell s-label" for="question-title-required">Question title <span class="s-label--status s-label--status__required">Required</span></label>
    <div class="grid ps-relative">
        <input class="grid--cell s-input" type="text" id="question-title-required" placeholder="e.g. Why doesn’t Stack Overflow use a custom web font?"/>
    </div>
</form>

Description copy

When a label or input needs further explantation, text should be placed directly underneath it.

<form class="grid gs4 gsy fd-column">
    <div class="grid--cell">
        <label class="d-block s-label" for="example-item">
            Question title
            <p class="s-description mt2">Clear question titles are more likely to get answered.</p>
        </label>
    </div>
    <div class="grid ps-relative">
        <input class="s-input" id="example-item" type="text" placeholder="e.g. Why doesn’t Stack Overflow use a custom web font?" />
    </div>
</form>