kevinpapst_kimai2/assets/sass/avatar.scss

$avatar-base-size: 30;

.initials {
    font-weight: bold;
    font-size: ceil(calc($avatar-base-size / 2 - 2))+px;
}

$avatarSizes: "xs" .75, "sm" 1.25, "md" 1.5, "lg" 2;

@each $avatarSizeName, $avatarBaseSize in $avatarSizes {
    .avatar-#{$avatarSizeName} {
        width: ceil(calc($avatar-base-size * $avatarBaseSize))+px;
        height: ceil(calc($avatar-base-size * $avatarBaseSize))+px;

        .initials {
            font-size: ceil(calc($avatar-base-size * $avatarBaseSize / 2 - 2))+px;
        }
    }
}

.widget-user-image {
    border-radius: 50%;
    border: 3px solid #fff;
    .avatar {
        width: ceil(calc($avatar-base-size * 2.75))+px;
        height: ceil(calc($avatar-base-size * 2.75))+px;
        .initials {
            font-size: ceil(calc($avatar-base-size * 2.75 / 2 - 2))+px;
        }
    }
}

/* Detail tables like my teams (Dashboard) or */
table.dataTable.table > tbody > tr > td {
    &.avatars {
        .avatar {
            margin: 1px;
        }
    }
}

/* decreases the margin between avatars, see https://github.com/tabler/tabler/issues/1567 */
.avatar-list-stacked .avatar {
    margin-right: calc(var(--tblr-avatar-size)*-.2)!important;
}