Круглые аватарки

.avatar img:hover, .avatar .img:hover, .avatarCropper:hover {
    border-radius: 50%;
}
.avatar img, .avatar .img, .avatarCropper {
    -webkit-transition: border-radius 1s ease;
    -moz-transition: border-radius 1s ease;
    -o-transition: border-radius 1s ease;
    -ms-transition:border-radius 1s ease;
    transition: border-radius 1s ease;
}