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 number of characters in a reminder title: 1,000*
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
* If you have upgraded your iCloud reminders on a device running iOS 13, iPadOS, or macOS Catalina, these limits on reminders do not apply. Learn more about the Reminders upgrade process.
Contacts
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
Bookmarks
Total number of bookmarks: 25,000
Maximum size of a bookmark: 4KB
Maximum size of all bookmarks: 24MB
