What is the maximum supported size of Auth0 User Profile with user_metadata, app_metadata, identities(Enterprise SAML/Social), OTP etc? Does it vary between Public and Private tenants?

• User Profiles
• app_metadata
• user_metadata

Both the user_metadata and app_metadata are constrained to be 16MB in size. Note: Only store essential data items in these profiles and under no circumstances should they be used as general-purpose data stores. Refer to the Profile Management Metadata Best Practices. 

For performance reasons, set 16kB as the upper practical limit for user_metadata and app_metadata.

In general, only identity-related content should be stored in the user profile. For content configuration items, we recommend storing them externally. This can be accessed during authentication using a rule, or directly from the app.

Note: This could add significant latency if they contain large amounts of non-essential data.