scale3d()

transform: scale3d(1, 1, 1);

transform: scale3d(1.3, 1.3, 1.3);

transform: scale3d(0.5, 1, 1.7);

transform: scale3d(-1.4, 0.4, 0.7);

<section class="default-example" id="default-example">
  <div class="transition-all" id="example-element">
    <div class="face front">1</div>
    <div class="face back">2</div>
    <div class="face right">3</div>
    <div class="face left">4</div>
    <div class="face top">5</div>
    <div class="face bottom">6</div>
  </div>
</section>

#default-example {
  background: linear-gradient(skyblue, khaki);
  perspective: 800px;
  perspective-origin: 150% 150%;
}
#example-element {
  width: 100px;
  height: 100px;
  perspective: 550px;
  transform-style: preserve-3d;
}
.face {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  position: absolute;
  backface-visibility: inherit;
  font-size: 60px;
  color: white;
}
.front {
  background: rgba(90, 90, 90, 0.7);
  transform: translateZ(50px);
}
.back {
  background: rgba(0, 210, 0, 0.7);
  transform: rotateY(180deg) translateZ(50px);
}
.right {
  background: rgba(210, 0, 0, 0.7);
  transform: rotateY(90deg) translateZ(50px);
}
.left {
  background: rgba(0, 0, 210, 0.7);
  transform: rotateY(-90deg) translateZ(50px);
}
.top {
  background: rgba(210, 210, 0, 0.7);
  transform: rotateX(90deg) translateZ(50px);
}
.bottom {
  background: rgba(210, 0, 210, 0.7);
  transform: rotateX(-90deg) translateZ(50px);
}

scale3d(sx, sy, sz)

<div>Normal</div>
<div class="scaled">Scaled</div>

div {
  width: 80px;
  height: 80px;
  background-color: skyblue;
}
.scaled {
  transform: perspective(500px) scale3d(2, 0.7, 0.2) translateZ(100px);
  background-color: pink;
}

<div>Normal</div>
<div class="scaled">Scaled</div>

div {
  width: 80px;
  height: 80px;
  background-color: skyblue;
}
.scaled {
  transform: perspective(500px) scale3d(2, 0.7, 0.2) translateZ(100px);
  transform-origin: left;
  background-color: pink;
}