Stamp border
HTML
<div class="stamp-border">
<div class="stamp-border__content"></div>
</div>
CSS
.stamp-border {
/* Background */
background-color: #d1d5db;
background-image: radial-gradient(#fff 50%, transparent 50%);
background-position: -0.25rem -0.25rem;
background-repeat: repeat;
background-size: 0.5rem 0.5rem;
/* Spacing */
padding: 0.25rem;
}
.stamp-border__content {
/* Background */
background-color: #d1d5db;
height: 100%;
width: 100%;
}
Demo