(sorted by aspect ratio, then by quality)

16:9

3840×2160 / 4K / Ultra-HD

1920×1080 / 2K / Full-HD

1600×900

4:3

2048×1536 / QXGA

1600×1200

1024×768 / XGA

1080×1080 / Instagram

Please do not ask for other resolutions of the pictures. They are available in the best quality I have.
Enjoy the wallpapers!!!