What is the recommended size for manga works?

he recommended image format for manga works is as follows.

Recommended pixel size: W 1700 (approx.) x H 2400 pixels
Maximum file size per image: 32MB
Maximum file size per manga: 200MB
Image file format: JPEG(JPG)/GIF/PNG
The recommended image size for posting on pixiv is 2400 pixels on the long side.

If you change the size of your original work by setting the length of the long side to 2400 pixels, the short side will be adjusted automatically. Changing the short side size manually may affect the quality of the work.
For this reason, please do not change the size of the short side manually when you change the long side to 2400 pixels.

Example:
If you reduce the size of a B5 page... W 1700 (approx.) x H 2400 pixels
If you reduce the size of an A5 page...W 1692 (approx.) x H 2400 pixels