<div class="wrapper">
  <p class="item item01">hover</p>
  <p class="item item02">hover</p>
  <p class="item item03">hover</p>
  <p class="item item04">hover</p>
</div>

.item{
  width: 200px;
  padding: 10px 0;
  margin: 25px auto 0;
  box-sizing: border-box;
  text-align: center;
  color: #fff;
  font-size: 24px;
  font-weight: bold;
  cursor: pointer;
}

.item01{
  background: #009933;
  border: 2px solid #009933;
  transition: all .2s ease-in-out;
}

.item01:hover{
  width: 250px;
}

.item02{
  background: #ff6600;
  padding: 12px 0;
  position: relative;
  overflow: hidden;
}

.item02:before,
.item02:after{
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 8px;
  box-sizing: border-box;
  background: #ff9900;
  transition: all .2s ease-in;
}

.item02:before{
  top: -8px;
}

.item02:after{
  bottom: -8px;
}

.item02:hover:before{
  top: 0;
}

.item02:hover:after{
  bottom: 0;
  width: 100%;
}

.item03{
  padding: 12px 0;
  background: #1A76C4;
  transition: all .4s;
}

.item03:hover{
  border-radius: 50px;
}

.item04{
  background: #ff0000;
  border: 2px solid #ff0000;
  transition: all .2s linear;
}

.item04:hover{
  background: #ffffff;
  border: 2px dotted #ff0000;
  color: #ff0000;
}