A gist for pagination in Twig, based on the total number of pages, the current page and some URL-settings.

pagination.html.twig

{#
  Source: http://dev.dbl-a.com/symfony-2-0/symfony2-and-twig-pagination/
  Updated by: Simon Schick <[email protected]>

  Parameters:
    * currentFilters (array) : associative array that contains the current route-arguments
    * currentPage (int) : the current page you are in
    * paginationPath (string) : the route name to use for links
    * showAlwaysFirstAndLast (bool) : Always show first and last link (just disabled)
    * lastPage (int) : represents the total number of existing pages
#}
{% spaceless %}
    {% if lastPage > 1 %}

        {# the number of first and last pages to be displayed #}
        {% set extremePagesLimit = 3 %}

        {# the number of pages that are displayed around the active page #}
        {% set nearbyPagesLimit = 2 %}

        <ul class="pagination">
            {% if currentPage > 1 %}
                <li class="page-item">
                    <a href="{{ paginationPath ~ '?' ~ currentFilters|merge({page: currentPage-1})|url_encode }}" class="page-link">Previous</a>
                </li>
                {% for i in range(1, extremePagesLimit) if ( i < currentPage - nearbyPagesLimit ) %}
                    <li class="page-item">
                        <a href="{{ paginationPath ~ '?' ~ currentFilters|merge({page: i})|url_encode }}" class="page-link">{{ i }}</a>
                    </li>
                {% endfor %}

                {% if extremePagesLimit + 1 < currentPage - nearbyPagesLimit %}
                    <li class="page-item disabled"><a href="#" class="page-link">...</a></li>
                {% endif %}

                {% for i in range(currentPage-nearbyPagesLimit, currentPage-1) if ( i > 0 ) %}
                    <li class="page-item">
                        <a href="{{ paginationPath ~ '?' ~ currentFilters|merge({page: i})|url_encode }}" class="page-link">{{ i }}</a>
                    </li>
                {% endfor %}
            {% elseif showAlwaysFirstAndLast %}
                <li class="page-item disabled"><a href="#" class="page-link">Previous</a></li>
            {% endif %}

            <li class="page-item">
                <a href="{{ paginationPath ~ '?' ~ currentFilters|merge({ page: currentPage })|url_encode }}"
                   class="page-link active">{{ currentPage }}</a>
            </li>

            {% if currentPage < lastPage %}
                {% for i in range(currentPage+1, currentPage + nearbyPagesLimit) if ( i <= lastPage ) %}
                    <li class="page-item">
                        <a href="{{ paginationPath ~ '?' ~ currentFilters|merge({page: i})|url_encode }}" class="page-link">{{ i }}</a>
                    </li>
                {% endfor %}

                {% if  (lastPage - extremePagesLimit) > (currentPage + nearbyPagesLimit) %}
                    <li class="page-item disabled"><a href="#" class="page-link">...</a></li>
                {% endif %}

                {% for i in range(lastPage - extremePagesLimit+1, lastPage) if ( i > currentPage + nearbyPagesLimit ) %}
                    <li class="page-item">
                        <a href="{{ paginationPath ~ '?' ~ currentFilters|merge({page: i})|url_encode }}" class="page-link">{{ i }}</a>
                    </li>
                {% endfor %}
                <li class="page-item">
                    <a href="{{ paginationPath ~ '?' ~ currentFilters|merge({page: currentPage+1})|url_encode }}" class="page-link">Next</a>
                </li>
            {% elseif showAlwaysFirstAndLast %}
                <li class="page-item disabled"><a href="#" class="page-link">Next</a></li>
            {% endif %}
        </ul>
    {% endif %}
{% endspaceless %}

Notes from original on usage (thank @SimonSimCity):

If you don't know how to use this - here's a short explanation:
Save the code visible here in a file. You can f.e. call it pagination.html.twig.

Now put some code like this into your template at the position, where the page-browser should appear (can as well be multiple times ... f.e. before and after your list of items):

{% include 'pagination.html.twig' with {
    currentFilters: { myFilter: filtervariables },
    currentPage: page,
    paginationPath: "myroute",
    lastPage: totalPages,
    showAlwaysFirstAndLast: true
} only %}