Create promo graphics

[Donnnno]

https://googlefonts.github.io/gf-guide/promotion.html

4 up to 10 images would be great
1,600 x 900 px (recommended) + some square versions for Instagram
Minimum Size: 600 x 335 px
Recommended Ratio: between 2:1 and 1:1
Supported Formats: GIF, MP4, JPG, and PNG
Max Image Size: Up to 1.75 MB for videos and svg; 800 kb for photos and GIFs.

Mastodon (Typo.Social)

1 to 4 colorful images
Supported formats: PNG, JPG, HEIF, WEBP
Recommended ratio: Ideally, the images have either a square 1:1 or 16:9 ratio 3840 x 2160 px

Instagram

1 to 10 colorful images
Landscape: 1080 x 566 pixels / Portrait: 1080 x 1350 pixels /
Square: 1080 x 1080 pixels. Recommended: Square images: jpeg, png / video: MOV, GIF, MP4

LinkedIn

1 to 20 colorful images
Use a 1.91:1 ratio (1200 x 627 pixels). The image must be more than 200 pixels wide.
Images: jpeg, png / video: MOV, GIF, MP4

Thread

1 to 10 colorful images
The maximum image height on Threads is 1424 pixels. Images taller than a 3:4 aspect ratio will be reduced in width to fit this image height. Threads’s maximum image display size is 1070 pixels wide by 1424 pixels tall. This 3:4 aspect ratio will give you the most visual impact because it has the greatest number of pixels.