Each platform has its own specifications for uploads. Following this ensures that:
Pixilation and image stretching are avoided.
Ensures that uploads look professional.
Uploads are optimized for each social channel’s feed. This can help increase engagement.
Your audience sees the full photo. Incorrect sizing could cut off some of your upload.
Instagram image sizes for feed photos
Landscape: 1080 x 566 pixels
Portrait: 1080 x 1350 pixels
Square: 1080 x 1080 pixels
Supported aspect ratios: Anywhere between 1.91:1 and 4:5
Recommended image size: Width of 1080 pixels, height between 566 and 1350 pixels (depending on whether the image is landscape or portrait)
Facebook image sizes
Recommended size: 1200 x 630 pixels
Minimum size: 600 x 315 pixels
Facebook ad sizes
Sizes for Facebook Feed ads: At least 1080 x 1080 pixels. Minimum size 600 x 600 pixels. Ratio 1.91:1 to 1:1. Maximum file size of 30 MB.
Sizes for Facebook Right Column ads: At least 1080 x 1080 pixels. Minimum size 254 x 133 pixels. Ratio 1:1. (Remember: These are a desktop-only ad format.)
Facebook image sizes for Instant Articles: At least 1080 x 1080 pixels. Ratio 1.91:1 to 1:1. Maximum file size of 30 MB.
Image sizes for Facebook Marketplace ads: At least 1080 x 1080 pixels. Ratio 1:1. Maximum file size of 30 MB.
Image sizes for Facebook Search: At least 1080 x 1080 pixels. Minimum size 600 x 600 pixels. Ratio 1.91:1 to 1:1. Maximum file size of 30 MB.
Facebook image sizes for Sponsored Messages: At least 1080 x 1080 pixels. Ratio 1.91:1 to 1:1. Maximum file size of 30 MB.
Sizes for Messenger inbox ads: At least 1080 x 1080 pixels. Ratio 1:1. Minimum size 254 x 133 pixels. Maximum file size of 30 MB.
Sizes for Messenger Stories ads: At least 1080 x 1080 pixels.
Pinterest image sizes for Pins
Aspect ratio: 2:3 (recommended)
Square pins: 1000 x 1000 pixels
Recommended size: 1000 x 1500 pixels
Max file size: 20MB
YouTube
Banner image size: 2048 x 1152 pixels
Aspect ratio: 16:9
Minimum area for text and logos without being cut off: 1235 x 338 pixels
Maximum file size: 6MB
LinkedIn image sizes for company pages
Company logo size: 300 x 300 pixels
Page cover image size: 1128 x 191 pixels
Life tab main image size: 1128 x 376 pixels
Life tab custom modules image size: 502 x 282 pixels
Life tab company photos image sizes: 900 x 600 pixels
Square logo: At least 60 x 60 pixels