The Big Easter Egg
4K HD Wallpaper: The Big Easter Egg
Indeed, a true big egg :). The image can be downloaded free under CC0 license if you like from courtesy of Gerd Altmann. Here's optimized for fit in desktop backgrounds, homescreen phones, blogs, social media, content marketing, apps...
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
High Definition HD 1080p: 1920x1080 (fits on: 1600x900, 1366x768, 1280x720)
Samsung Galaxy Tab & iPad: 2048x2048 (compatible with many tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many phones)