Title: Thumbnail size, not with CSS
Last modified: March 1, 2017

---

# Thumbnail size, not with CSS

 *  [onedaystop](https://wordpress.org/support/users/onedaystop/)
 * (@onedaystop)
 * [9 years, 2 months ago](https://wordpress.org/support/topic/thumbnail-size-not-with-css/)
 * How to change thumbnails image size?
    Not in CSS but in . Now I get size of 150
   ×150 and I do need a 600×300 (defined in WP as ‘medium’).

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Sovrn](https://wordpress.org/support/users/sovrn/)
 * (@sovrn)
 * [9 years, 2 months ago](https://wordpress.org/support/topic/thumbnail-size-not-with-css/#post-8872317)
 * Hello [@onedaystop](https://wordpress.org/support/users/onedaystop/),
 * Thank you for your inquiry! Would you like to change your thumbnail size using
   the custom CSS? Or using the Custom size thumbnails under the advanced settings?
   If you could email us at [ea-support@sovrn.com](https://wordpress.org/support/topic/thumbnail-size-not-with-css/ea-support@sovrn.com?output_format=md)
   at your earliest convenience, we would be happy to assist you!
 * Regards,
 * Sovrn Support
 *  Anonymous User 12851872
 * (@anonymized-12851872)
 * [8 years, 9 months ago](https://wordpress.org/support/topic/thumbnail-size-not-with-css/#post-9353781)
 * Hi,
    Why not use advanced settings ans “Enable custom CSS”
 *     ```
       ul.related_post li {
       width: 600px !important;
       }
       ul.related_post li a {
       }
       ul.related_post li img {
           width: 600px !important;
           height: 300px !important;
       }
       ```
   
 * Then line custom size thumbnails, check “Use Custom Size Thumbnails”
    and fill
   the line below Custom Width (px) 600 Custom Height (px) 300

Viewing 2 replies - 1 through 2 (of 2 total)

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## Tags

 * [size](https://wordpress.org/support/topic-tag/size/)
 * [thumbnail](https://wordpress.org/support/topic-tag/thumbnail/)

 * 2 replies
 * 3 participants
 * Last reply from: Anonymous User 12851872
 * Last activity: [8 years, 9 months ago](https://wordpress.org/support/topic/thumbnail-size-not-with-css/#post-9353781)
 * Status: not resolved