Images
Image Rounded &Circle
Use classes .roundedand .rounded-circle.
Image thumbnails
In addition to our border-radius utilities,you can use .img-thumbnailto give an image a rounded 1px border appearance.
Responsive images
Images in Bootstrap are made responsive with .img-fluid. max-width:100%;and height:auto;are applied to the image so that it scales with the parent element.
Image Sizes
.avatar-sm
.avatar-md
.avatar-lg
.avatar-sm
.avatar-md
.avatar-lg
