Limits for iCloud Contacts, Calendars, Reminders, and Bookmarks

To help iCloud keep your Contacts, Calendars, Reminders, and Bookmarks up to date, keep your information within these limits.

Calendars and Reminders

  • Total number of calendars, events, and reminders: 50,000
  • Maximum combined number of calendars and reminder lists you can have: 100
  • Maximum size of all calendar and reminder data (not including attachments): 1GB
  • Maximum size of a calendar event including attachments: 20MB
  • Maximum number of attachments per event: 20
  • Maximum number of attendees you can invite to an event: 300
  • Maximum number of people with whom you can share a private calendar: 100
  • Maximum number of characters in a reminder title: 1000


  • Total number of contact cards: 50,000
  • Maximum size of a contact card: 256KB
  • Maximum size of a contact photo: 224KB
  • Maximum size of a contact group: 256KB
  • Maximum size of all contact cards:
    • Card text: 48MB
    • Card photos: 200MB
  • Supported file types for a contact photo: JPEG, BMP, PNG, GIF
  • vCard import limits:
    • Total number of vCards: 50,000
    • Maximum size of a vCard: 256KB (photo + text)
    • Maximum photo size for a vCard: 224KB


  • Total number of bookmarks: 25,000
  • Maximum size of a bookmark: 4KB
  • Maximum size of all bookmarks: 24MB

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