.slick-next{
  right: 25px;
}

.slick-prev{
  left: 25px; 
 
 
}

.slick-next ,.slick-prev{
  z-index: 5;
  width: 40px;
  height: 40px;
}

.slick-prev:before, .slick-next:before{
  font-size: 40px;
}