Answers for "bootstrap class for image"

responsive image in bootstrap

<img src="..." class="img-responsive">

bootstrap image size

<div class="w-25 p-3" style="background-color: #eee;">Width 25%</div>
<div class="w-50 p-3" style="background-color: #eee;">Width 50%</div>
<div class="w-75 p-3" style="background-color: #eee;">Width 75%</div>
<div class="w-100 p-3" style="background-color: #eee;">Width 100%</div>

bootstrap img src

<img src="..." class="rounded mx-auto d-block" alt="...">

img class bootstrap

<!-- Circuler Image -->
 <img src="cinqueterre.jpg" class="img-circle" alt="Cinque Terre"> 
 
<!-- Image With some border-raduis property  -->
 <img src="cinqueterre.jpg" class="img-rounded" alt="Cinque Terre"> 
 
<!-- Image like thumbnail  -->
 <img src="cinqueterre.jpg" class="img-thumbnail" alt="Cinque Terre">