Result

flexboxでハニカム構造なレイアウトです
ヘキサゴンブロックを並べてRWDに対応したもの

css

.honeycomb {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  justify-content: center;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0;
  transform: translateY(34.375px);
}
.honeycomb-cell {
  flex: 0 1 250px;
  max-width: 250px;
  height: 137.5px;
  margin: 65.4761904762px 12.5px 25px;
  position: relative;
  padding: 0.5em;
  text-align: center;
  z-index: 1;
}

.honeycomb-cell__image {
  object-fit: cover;
  object-position: center;
}
.honeycomb-cell::before, 
.honeycomb-cell::after {
  content: '';
}
.honeycomb-cell::before, 
.honeycomb-cell::after, 
.honeycomb-cell__image {
  top: -50%;
  left: 0;
  width: 100%;
  height: 200%;
  display: block;
  position: absolute;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  z-index: -1;
}

レイアウトに関わる部分だけ抜粋しています

html

<ul class="honeycomb" lang="es">
  <li class="honeycomb-cell">
    <img class="honeycomb-cell__image" src="https://picsum.photos/200/300">
    <div class="honeycomb-cell__title">01</div>
  </li>
  <li class="honeycomb-cell">
    <img class="honeycomb-cell__image" src="https://picsum.photos/200/301">
    <div class="honeycomb-cell__title">02</div>
  </li>
・
・
・
</ul>

via

Responsive Honeycomb Layout