span.icon img{max-height:55px;max-width:55px}.no-icon
span.icon2 img{max-height:40;max-width:40px}.no-icon

.swap a {
  display: block;

}

.swap a img {
  opacity: 1;
  width: 200px;
  height: auto;
  display: block;
  transition: all .9s ease-in-out;
}

.swap a:hover img {
  opacity: 0.5;
  transition: all .6s ease-in-out;
}