<h3 class="wide-border"> I have a wide border  </h3>

<h3 class="thin-border"> My border is thin </h3>

.wide-border{
  border-style: solid;
  border-color:black;
  border-width:10px;
  text-align: center;
  color: blue; 
}
.thin-border{
  border-style: solid;
  border-color:black;
  border-width:2px;
  text-align: center;
  color: red; 
  
}