Bootstrap class: .form-check-inline

<div class="form-check form-check-inline">
  <input class="form-check-input" type="checkbox" id="inlineCheckbox1" value="option1">
  <label class="form-check-label" for="inlineCheckbox1">1</label>
</div>
<div class="form-check form-check-inline">
  <input class="form-check-input" type="checkbox" id="inlineCheckbox2" value="option2">
  <label class="form-check-label" for="inlineCheckbox2">2</label>
</div>

Preview

Sass source

/* _forms.scss:227 */
.form-check-inline {
  display: inline-flex;
  align-items: center;
  padding-left: 0; // Override base .form-check
  margin-right: $form-check-inline-margin-x;

  // Undo .form-check-input defaults and add some `margin-right`.
  .form-check-input {
    position: static;
    margin-top: 0;
    margin-right: $form-check-inline-input-margin-x;
    margin-left: 0;
  }
}

Uses variables

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/* _forms.scss:227 */
$form-check-inline-margin-x
$form-check-inline-input-margin-x

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