govuk-frontend/dist/govuk/components/input/template-with-width-2-class.html

GOV.UK Frontend contains the code you need to start building a user interface for government platforms and services.

<div class="govuk-form-group">
  <label class="govuk-label" for="input-width-2">
    National insurance number
  </label>
  <div id="input-width-2-hint" class="govuk-hint">
    It’s on your National Insurance card, benefit letter, payslip or P60. For example, ‘QQ 12 34 56 C’.
  </div>
  <input class="govuk-input govuk-input--width-2" id="input-width-2" name="test-width-2" type="text" aria-describedby="input-width-2-hint">
</div>