bootstrap rounded button
<img src="..." alt="..." class="rounded"> <img src="..." alt="..." class="rounded-top"> <img src="..." alt="..." class="rounded-right"> <img src="..." alt="..." class="rounded-bottom"> <img src="..." alt="..." class="rounded-left"> <img src="..." alt="..." class="rounded-circle"> <img src="..." alt="..." class="rounded-pill"> <img src="..." alt="..." class="rounded-0">