JSFiddle - React, Tailwind, and code Playground

HTML

<textarea rows="4" name="mensaje" placeholder="CONSULTA" required="required" ></textarea>

CSS

textarea { 
padding:5px;
 -moz-box-sizing: border-box;
 -webkit-box-sizing: border-box;
 box-sizing: border-box;
}
::-webkit-input-placeholder {
	text-align:left;
	font-size:11px;
}
:-moz-placeholder { /* Firefox 18- */
	text-align:left;
	font-size:11px;
}
::-moz-placeholder {  /* Firefox 19+ */
	text-align:left;
	font-size:11px;
}
:-ms-input-placeholder {  
	text-align:left;
	font-size:11px;
}