.btn-xs, .btn-group-xs > .btn {
    padding: 0.25rem 0.65rem;
    font-size: 0.65rem;
    line-height: 1.2;
    border-radius: 0.125rem;
}

.btn-xs + .dropdown-toggle-split, .btn-group-xs > .btn + .dropdown-toggle-split {
    padding-right: 0.5625rem;
    padding-left: 0.5625rem;
}