<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=">
  <title>Animated Social media icons</title>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.14.0/css/all.min.css" />
</head>
<body>
  <div class="sm">
    <a href="#"><i class="fab fa-facebook-f"></i></a>
    <a href="#"><i class="fab fa-twitter"></i></a>
    <a href="#"><i class="fab fa-instagram"></i></a>
    <a href="#"><i class="fab fa-youtube"></i></a>
    <a href="#"><i class="fab fa-linkedin-in"></i></a>
    <a href="#"><i class="fab fa-behance"></i></a>
  </div>
</body>
</html>
body
{
  margin: 0;
  padding: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #2f3640;
}

.sm a
{
  display: inline-block;
  font-size: 40px;
  color: #fa8231;
  width: 100px;
  height: 100px;
  line-height: 100px;
  text-align: center;
  margin: 0 16px;
  transition: .4s linear;
  position: relative;
  box-shadow:0 0 0 1px rgba(0,0,0,0);
}

.sm a::before, .sm a::after
{
  content: '';
  position: absolute;
  box-sizing: border-box;
  width: 100%;
  height: 100%;
/*   border: 4px solid; */
  left: 0;
  top: 0;
  transition: .4s linear;
  box-shadow:0 0 0 1px rgba(0,0,0,0);
}

.sm a:hover
{
  transform: scale(.8);
}

.sm a:hover::before
{
  border-left: 4px solid;
  border-right: 4px solid;
  transform: skewX(20deg);
}

.sm a:hover::after
{
  border-top: 4px solid;
  border-bottom: 4px solid;
  transform: skewY(-20deg);
}
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