{% if product.siblings.size > 0 %}
{% assign limit = 4 %}
{% if product.siblings.size > 4 %}
{% assign limit = 3 %}
{% endif %}
{% for sibling in product.siblings limit:limit%}
{% endfor %}
{% if product.siblings.size > 4 %}

+{{ product.siblings.size | minus: 4 }} More
{% endif %}
{% endif %}