Hi!
I have tried to look up our conversation, but I could not find any emails from this account email, I guess you used a different one?
Anyways, as I probably mentioned, the filters can be set up based on post types, publish dates, taxonomy terms, and custom fields. You are very likely looking for taxonomy term and custom field filters. To learn more about those, you can check these documentation chapters:
– Taxonomy Term filters
– Custom field filters
Basically, if you have the posts categorized by a certain taxonomy criteria, you are looking for taxonomy term filters. If there are custom fields defined (post meta) to store information (like size, location etc) on posts, the use the custom field filters. These are the two basic methods for wordpress to store additional information related to post type objects. Taxonomy terms (like categories) are more of a ‘catalogisation’ feature, while custom fields are to store additional information.
This tutorial might also be worth looking into, it uses both version of filters.
I hope this helps!