Try it Live

​x
 
<!DOCTYPE html>
 <html>
 <head>
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <style>
   #mainDiv {
     width:40%;
     height:260px;
     padding:50px;
     margin:10px;
     background-color:powderblue;
     border-radius:50%;  
     border: 20px solid blue;
     text-align:left;
   }
   </style>
 </head>
 <body>
  <div id="mainDiv">
   <p style=font-size:12px;>rounded</p> 
  </div>
 </body>
</html>
​