Twitter

280 character limit including hashtags, links, and tags.

Image Guidelines
In-stream image size: 1024 x 512 pixels (recommended)
Minimum size: 440 x 220 pixels.
Recommended aspect ratio: 16:9.
Supported formats: .GIF, .JPG, .PNG.
Maximum file size: 3 MB for photos, 5 MB for animated gifs.

Facebook

No character limit, shorter posts perform better.

Image Guidelines
Recommended upload size of 1,200 x 628 pixels.
Square Photo: Minimum 154 x 154px in feed.
Square Photo: Minimum 116 x 116 on page.
Rectangular Photo: Minimum 470 x 246 pixels in feed.
Rectangular Photo: Minimum 484 x 252 on page.
Facebook will scale photos under the minimum dimensions.

LinkedIn

Image Guidelines
The image should use a 1.91:1 ratio (1200 x 627 px)
At least more than 200px width.
If the image width is less than 200px, it will appear as a thumbnail on the left side of the post.

Instagram

Since Instagram is video/image driven, ideal caption length is 138-150 characters.

Image Guidelines
1080px by 1080px (Square)
1080px by 1350px (Portrait)
1080px by 608px (Landscape)

Character references: https://sproutsocial.com/insights/social-media-character-counter/
Image size references https://www.falcon.io/insights-hub/topics/social-media-management/social-media-images-guides/#:~:text=LinkedIn%20post%20image%20size%3A%201200,LinkedIn%20video%20length%3A%2010%20minutes

File Submission

E-mail: ads@whattheythink.com. Files must not exceed 10 MB in size.

Web File Transfer Service: If ad files are larger than 10 MB please use a web-based file transfer service such as DropBox or WeTransfer. Please send a download link to your ad to ads@whattheythink.com

Need help?

If you are unsure of ad sizes or have any questions about file preparation please contact ads@whattheythink.com.