<div class="grid">
  <div class="item item-1">Item 1</div>
  <div class="item item-2">Item 2</div>
  <div class="item item-3">Item 3</div>
  <div class="item item-4">Item 4</div>
  <div class="item item-5">Item 5</div>
  <div class="item item-6">Item 6</div>
</div>
.grid {
  display: grid;
  grid-template-columns: 100px 200px 300px;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.