Select: Size Variation Height

<p class="input">
    <select name="" class="lower">
        <option value="">1</option>
        <option value="">2</option>
        <option value="">3</option>
        <option value="">4</option>
        <option value="">5</option>
    </select>
</p>

<br><br>

<p class="input">
    <select name="" class="low">
        <option value="">1</option>
        <option value="">2</option>
        <option value="">3</option>
        <option value="">4</option>
        <option value="">5</option>
    </select>
</p>

<br><br>

<p class="input">
    <select name="">
        <option value="">1</option>
        <option value="">2</option>
        <option value="">3</option>
        <option value="">4</option>
        <option value="">5</option>
    </select>
</p>

<br><br>

<p class="input">
    <select name="" class="high">
        <option value="">1</option>
        <option value="">2</option>
        <option value="">3</option>
        <option value="">4</option>
        <option value="">5</option>
    </select>
</p>

<br><br>

<p class="input">
    <select name="" class="lofty">
        <option value="">1</option>
        <option value="">2</option>
        <option value="">3</option>
        <option value="">4</option>
        <option value="">5</option>
    </select>
</p>