<!doctype html>
<meta charset="utf8">
<title>CSS contain-intrinsic-size: grid definite size</title>
<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#intrinsic-size-override">

<style>
#grid {
  border: 3px solid black;
  display: grid;
  grid-template: 55px 66px / 77px 88px;
  box-sizing: content-box;
  width: 70px;
  height: 80px;
  background: lightblue;
  grid-gap: 5px;
}
.item {
  background: lightgreen;
  opacity: 0.5;
  height: 100%;
}
</style>

<div id=grid>
  <div class=item></div>
  <div class=item></div>
  <div class=item></div>
  <div class=item></div>
</div>
