<div class="bg">
  <img class="img-polygon03" src="https://www.eyesofc.co.jp/webeyes/_demo/torarin/202104/sample.jpg" alt="サンプル画像">
</div>
.bg {
  width: 220px;
  max-height: 220px;
  background-color: #003366;
}
img {
  width: 200px;
  height: 200px;
}
.img-polygon03 {
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
}

External CSS

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External JavaScript

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