WeChat’s official backend has a size reminder, which requires a cover image of 360*200, a non-first image and text cover with multiple images and text is 200*200, and the image size within the text is also 200*200. You can use other sizes as long as the proportions are close.

There are no strict requirements for text images, and the size cannot exceed 2M. There is no big requirement for the height, but the width cannot be much larger than the height, otherwise the compression will be severe and unsightly.