Markup: ..\..\styleguide\templates\atoms\inputs\select.html
<select name="select_option" class="rocksite-a-select " aria-label="Shop order">
<option value="first-option">
First option
</option>
<option value="second-option" selected="selected">
Second option
</option>
<option value="third-option">
Third option
</option>
<option value="fourth-option">
Fourth option
</option>
</select>
../source/scss/components/atoms/_inputs.scss
, line 104