Wrap your content with .avatarclass and wrap your text in .avatar-contentto create a avatar.You have to use inline attributesto set height width of image in default avatar.

use class .avatar-{sm|lg|xl}to modify size of your avatar.

use class bg-{color-name}to change background color of your avatar

You can add notification label to avatar by using .badgewith .badge-up

use class .avatar-status-{online | offline | away | busy}after .avatar-content to create avatar with status