HTML:-
You can use it as a pseudo element and you will have better control on the position and also the size:
ul {
list-style:none;
}
li {
position:relative;
}
li:before {
content:"";
position:absolute;
top:2px;
left:-20px;
width:16px;
height:16px;
background:url(https://i.stack.imgur.com/yGSp1.png);
}
<ul>
<li>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Reprehenderit, consequatur?</li>
<li>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Reprehenderit, consequatur?</li>
<li>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Reprehenderit, consequatur?</li>
<li>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Reprehenderit, consequatur?</li>
</ul>