I know that Wordpress has its way of letting the browser decide which image to download depending on the viewport via the srcset.

I also know that I can use the_post_thumbnail function and specify a custom size, like this:


Now, what I would like to achieve is being able to specify a list of custom sizes (of different aspect ratio from the original image), and letting the browser decide with one to use based on the viewport.

I DON'T want to just add a custom size to the list of possibilites in srcset, I want to choose the whole list of available sizes.

I DON'T want to override the general setting of srcset of the entire website. I want to specify this list of sizes only in one section.

Is this possible?

1 Answer 1


The 2nd argument of the_post_thumbnail() is an array of attributes and values, so you can just set your own srcset attribute that way:

        'srcset' => wp_get_attachment_image_url( get_post_thumbnail_id(), 'my-other-custom-size' ) . ' 1000w',
  • 1
    +1 get_post_thumbnail_id is the correct function
    – Amin
    Sep 8, 2021 at 19:45
  • Hey buddy, I know this isn't the right place, yet I had a question very similar to this, how am I supposed to use wordpress's built in image sizes and club them all together in SRCSET... wordpress.stackexchange.com/questions/395376/… Please Help Sep 9, 2021 at 3:10

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