<div class="row">
  <div class="col">
    <div class="col-inner">
      <img src="https://upload.wikimedia.org/wikipedia/commons/6/61/HTML5_logo_and_wordmark.svg" alt="">
      <a href="#">more</a>
    </div>
  </div>
  <div class="col">
    <div class="col-inner">
      <img src="https://upload.wikimedia.org/wikipedia/commons/d/d5/CSS3_logo_and_wordmark.svg" alt="">
      <a href="#">more</a>
    </div>
  </div>
  <div class="col">
    <div class="col-inner">
      <img src="https://upload.wikimedia.org/wikipedia/commons/6/61/HTML5_logo_and_wordmark.svg" alt="">
      <a href="#">more</a>
    </div>
  </div>
  <div class="col">
    <div class="col-inner">
      <img src="https://upload.wikimedia.org/wikipedia/commons/d/d5/CSS3_logo_and_wordmark.svg" alt="">
      <a href="#">more</a>
    </div>
  </div>
  <div class="col">
    <div class="col-inner">
      <img src="https://upload.wikimedia.org/wikipedia/commons/6/61/HTML5_logo_and_wordmark.svg" alt="">
      <a href="#">more</a>
    </div>
  </div>
  <div class="col">
    <div class="col-inner">
      <img src="https://upload.wikimedia.org/wikipedia/commons/d/d5/CSS3_logo_and_wordmark.svg" alt="">
      <a href="#">more</a>
    </div>
  </div>
  <div class="col">
    <div class="col-inner">
      <img src="https://upload.wikimedia.org/wikipedia/commons/6/61/HTML5_logo_and_wordmark.svg" alt="">
      <a href="#">more</a>
    </div>
  </div>
  <div class="col">
    <div class="col-inner">
      <img src="https://upload.wikimedia.org/wikipedia/commons/d/d5/CSS3_logo_and_wordmark.svg" alt="">
      <a href="#">more</a>
    </div>
  </div>
</div>

* {
  box-sizing: border-box;
}

html,
body {
  padding: 0;
  margin: 0;
}

img {
  max-width: 100%;
  height: auto;
  max-height: 50px;
}

a {
  display: block;
  width: 100%;
}

.row {
  display: flex;
  flex-flow: row wrap;
  overflow: hidden;
  height: 300px;
}

.col {
  -ms-flex: 0 0 25%;
  flex: 0 0 25%;
  max-width: 25%;
  height: 50%;
  text-align: center;
  
}

.col-inner {
  width: 100%;
  height: 100%;
  padding: 20px;
  position: relative;

  display: flex;
  flex-flow: row wrap;
  align-items: center;
  justify-content: center;

  
  margin-top: -1.5px;
  margin-left: -1.5px;
}

.col-inner:before,
.col-inner:after {
  content: '';
  position: absolute;
  background: #d7d7d7;
}

.col-inner:before {
  left: 10px;
  right: 10px;
  top: 0;
  height: 1px;
}

.col-inner:after {
  top: 10px;
  bottom: 10px;
  left: 0;
  width: 1px;
}