What image size must you use?

All of the field limits and photo dimensions for the different areas of the platform can be found here.

Picture - 1mb (200x200px, squared ratio)
First name - 100 characters
Last name - 100 characters
Job title - 255 characters
Biography - 1000 characters

Name - 255 characters
Description - No limit
Logo - 1mb (400x200px, 2:1 ratio)
Banner image - 1mb (1200x675px, 16:9 ratio)
Ad - 1mb (1080x1920px, 9:16 ratio)
Background - 1mb (2560x1600px, 16:10 ratio)

Title - 255 characters
Description - 1990 characters
Picture - 1mb (400x400px, 1:1 ratio)
Number of pictures - no limit

Title - 80 characters
Description - 160 characters
Size - 30mb