<div class="img-wrapper">
    <img class="inner-img" src="https://source.unsplash.com/random/400x400" />
</div>

<!-- Additional examples -->

<div class="img-wrapper">
    <img class="inner-img" src="https://source.unsplash.com/random/401x401" width="400px" height="400px" />
</div>

<div class="img-wrapper">
    <img class="inner-img" src="https://source.unsplash.com/random/402x402" width="400px" height="400px" />
</div>

.img-wrapper {  
  width: 400px;
  height: 400px;
  overflow: hidden; 
}

.inner-img {
  transition: 0.3s;
}

.inner-img:hover {
  transform: scale(1.1);
}

/* Other styling elements, that are not necessary for the example */

.img-wrapper {
  display: inline-block;
  box-sizing: border-box;
  //border: 1px solid #000;
}