Answers for "how to make a border round css"

css circle border

.circle {
    background-color:#fff;
    border:1px solid red;    
    height:100px;
    border-radius:50%;
    -moz-border-radius:50%;
    -webkit-border-radius:50%;
    width:100px;
}
<div class="circle"></div>

how to make borders rounded in css

#rcorners {
  border-radius: 25px;
}

html round border

<button style="border-radius: 3rem">OK</button>