Check out example codes for "hover reinzoomen css". It will help you in understanding the concepts better.

Code Example 1

div.image {
	width: 300px;
	height: 200px;
	overflow: hidden;
}
div.image img {
	width: 100%;
	height: auto;
	/* SCALE */
	-webkit-transform: scale(1);
	-moz-transform: scale(1);
	-ms-transform: scale(1);
	-o-transform: scale(1);
	transform: scale(1);
	/* VERZÖGERUNG */
	-webkit-transition: all 0.3s linear;
	-moz-transition: all 0.3s linear;
	-ms-transition: all 0.3s linear;
	-o-transition: all 0.3s linear;
	transition: all 0.3s linear;
}
div.image img:hover {
	-webkit-transform: scale(1.2);
	-moz-transform: scale(1.2);
	-ms-transform: scale(1.2);
	-o-transform: scale(1.2);
	transform: scale(1.2);
}

Code Example 2

/*Zoom on hover*/

<style>
.zoom {
  padding: 50px;
  background-color: green;
  transition: transform .2s; /* Animation */
  width: 200px;
  height: 200px;
  margin: 0 auto;
}

.zoom:hover {
  transform: scale(1.5); /* (150% zoom)*/
}
</style>

<div class="zoom"></div>

/*credits: w3schools.com */

Code Example 3

transform: scale(1.5);

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