Instagram:

Instagram Reels/Story/IG TV: 9:16 (1080 x 1920)
IGTV Cover Photo: 1:1.55 (420x654)
Twitter, Facebook, Linked In:
Twitter Header/Facebook Business Profile: 1500 x 500
Linked In Personal Profile: 1584 x 396
Facebook Personal Profile: 820 x 312
Linked In Business Profile: 1128 x 191
HoneyBook:
Main Logo: 100 x 100
Secondary Logo: 300 x 100
Profile Photo: 360 x 360
Email Signature Icon: 100 x 100
Header Image: 750 x 300
Project Page Header: 1200 x 400
Item Images: 110 x 110
Brochure Images: 780 px wide
Kajabi:
Pages Added Image: 1920 x 1080