Adding images to your blog posts help break up the content, makes them visually appealing, and enhances your storytelling. By using keywords in the image filenames you can also help boost your Search Engine Optimization (SEO). Alternative text should always be included and captions are highly recommended, unless the reader can already understand the image content based on surrounding text.
WordPress has a few size options available when you are adding your image. The sizes listed are the maximum size and may be reduced to fit the space available on various devices and will also vary based on the layout of sidebars on your blog site.
- Thumbnail: 150 px by 150 px (square)
- Medium: 300 px by 200 px (wide or tall)
- Large: 1024 px by 680 px (wide or tall)
- Full Size: the original size of your image
For original images larger than the Large size you should avoid using the Full Size option. The image will not display any bigger, but the Full Size image will slow down the webpage loading speed.
The system will not scale or stretch any images to be larger than their original size. If your original image dimensions fall below one of the listed maximum sizes, that option will not be available for you to insert.