How To Change Width and Height of Post Thumbnails

If you want to change dimensions of thumbnails( auto read more thumbnails), follow these simpe steps.

Auto Read More Thumbnails
Auto Read More Thumbnails

Now go to "Design" --> "Edit HTML". (if you are using Blogger new interface go to "Template" --> "Edit HTML").

Click on "Expand Widget Templates".

Find this (some parts of the code can be different,according to your template.):

<script type='text/javascript'>
summary_noimg = 600;
summary_img = 500;
img_thumb_height = 150;
img_thumb_width = 200;

Look at the image:

Thumbnail Sizes
To Change Thumbnail Sizes Find This

To change width, change the value of  img_thumb_width.
To change height, change the value of  img_thumb_height.

For example I change thumbnail width as 300px and height as 200px. Now code should be:

<script type='text/javascript'>
summary_noimg = 600;
summary_img = 500;
img_thumb_height = 200;
img_thumb_width = 300;

save the template. refresh your site.

Width and Height of Thumbnail Has Changed
Width and Height of Thumbnail Has Changed

18 thoughts on “How To Change Width and Height of Post Thumbnails

  1. Thanks for sharing nice tip.

    To avoid blurred photo with large size, I adjusted s800 instead of s400.

    For example this image :


  3. hello! i coulden't find the code i was supposed to look for. anyway, i wanted to ask you if there is any way to have a comment box for blogger, like this one, the wp comment box.

    thank you.

  4. Can I set auto-generated thumbnails instead of these fixed dimensions? I want the thumbs like they are on the recent posts or popular posts widgets. If you look at my blog homepage, you'll see that the fixed widths don't look good because they are always stretched in some way.

    1. Hello Rishabh

      Example to change thumbnail to fixed dimension

      Change this code:
      img_thumb_height = 150 ;
      img_thumb_width = 150;

      img_thumb_height = 150 ;
      img_thumb_width = null;

      img_thumb_height = null;
      img_thumb_width = 150;

  5. Thank You so Much for Sharing this. I've been trying to figure this out now for over 2 weeks. THANK YOU. I really really appreciate it.

    Keep up the good work. : )

  6. Its possible to put iframe or any embedded item istead of images? because can change the text area height but when i put some embedded post, not showing anything

  7. Hi! I don't have this code in the template I am working on. I am just trying to change the mobile view thumbnail size which is what this would do, correct?

    Would I just add the code you have above maybe before </body>

    This is the site I am working on:

    Thank you SO much!

Leave a Reply

Your email address will not be published. Required fields are marked *