Photos sizes can be defined by social media as:
Aspect ratios
Pixel size
Image editor resize
Cover art photo - 828 x 464
Profile photo - 360 x 360
Link image - 1200 x 628
Photo post - 940 x 788
Profile image - 400 x 400
Background images - between 1000 x 425 and 4000 x 4000
Header photo - 1500 x 500
Profile photo - 500 x 500
Tweeted photo - 1024 x 500
Profile photo - 180 x 180
Photo post -1080 x 1080
Adobe Spark
Tech Smith Snagit