JSFiddle - React, Tailwind, and code Playground

HTML

<select id="sele">
    <option>あいうえお</option>
    <option>かきくけこ</option>
    <option>さしすせそ</option>
</select>
<p id="para">
    たちつてと    
</p>

CSS

#sele, #para{
    font-size:16px;
    height:25px;
    width:100px;
    border:1px solid;
    margin:0;
    padding:1px;
    float:left;
    box-sizing:content-box;
}