If you want truly "big" pictures, NASA provides some of the largest files available to the public—massive composites of galaxies and planets that can be several gigabytes in size.
This article explores the evolution of high-definition imagery, where to find "big" pictures, and how to manage them without slowing down your devices. 1. The Rise of Large-Format Digital Imagery bigasspics
If you’re a blogger, use WebP. It provides the high resolution of a "big" pic but at a fraction of the file size. If you want truly "big" pictures, NASA provides
The number of pixels (e.g., 7680 × 4320 for 8K). If you want truly "big" pictures
For billboards, posters, or home decor.