Several types of fields in Marketo have requirements for the type of data that can be stored, as well as the limit to how much data can be contained in that field type. The Custom Field Type Glossary can tell you what fields are available, and this article will show you details on the type and maximum limits for those fields.
Field Types & Limits
Boolean
Can only be set to “true” or “false” (stored in the database as 1 or 0).
Currency
Maximum value of 9223370000000000000. Will be displayed with the currency set in your instance under Admin -> Location.
Date
Must be formatted “MM/DD/YYYY”.
Datetime
Must be formatted “MM/DD/YYYY HH:MM:SS”.
Email
Must be a properly formatted email (user@example.com).
Float
Can include decimals up to the hundredths place. The value will round to the nearest hundredth (eg. 99.999 rounds to 100, 99.985 rounds to 99.99). Maximum value of 10000000000.
Formula
See this guide: Create and Use a Concatenated String (Formula) Field
Integer
Values are limited to between -2147483647 to 2147483647.
Percent
Must be a full number without decimals. Maximum value of 9223370000000000000.
Phone
Can have letters, numbers, or characters. Maximum of 2,000 characters.
Score
Maximum score of 2147483647. If the score is increased higher than that, the score will reset to -2147483647.
String
Can contain letters, numbers and special characters. Limit of 255 total characters
Text Area
Can contain letters, numbers and special characters. Limit of 65,535 total characters
URL
"http://" will automatically be appended to the value if the value doesn't have that prefix or "https://" already. Does not have to be formatted any further (Generic top-level domain not required).
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