Available Constraints by Option Type
Text Input Constraints
For text input and paragraph text input options, you can set:
Minimum Characters: Require customers to enter at least this many characters
Maximum Characters: Limit text to a maximum number of characters (up to 280)
Example use cases:
Require at least 3 characters for personalized names
Limit engraving text to 40 characters
Set a minimum of 10 characters for custom messages
Number Input Constraints
For number options, you can set:
Minimum Value: The lowest number customers can enter
Maximum Value: The highest number customers can enter
Step Increment: Force values to be multiples of a specific increment (e.g., 0.5, 5, 10)
Example use cases:
Require quantities between 1 and 100
Allow only even numbers with a step of 2
Set decimal increments like 0.25 for measurements
File Upload Constraints
For file upload options, you can set:
Allowed File Extensions: Comma-separated list of accepted file types (e.g., jpg, png, pdf)
Max File Size: Maximum file size in MB
Example use cases:
Only accept image files: jpg, png, gif
Limit uploads to 5MB for faster processing
Accept documents: pdf, doc, docx
Date Input Constraints
For date options, you can set:
Earliest Date Allowed: The first date customers can select
Latest Date Allowed: The last date customers can select
Disabled Weekdays: Block specific days of the week (e.g., no Sundays or Mondays)
Excluded Dates: Comma-separated list of specific dates to exclude (format: YYYY-MM-DD)
Example use cases:
Block past dates by setting earliest date to today
Disable weekends for business day delivery
Exclude holidays: 2025-12-25, 2025-12-26
Limit bookings to the next 90 days
Setting Constraints
Constraints appear in the sidebar when editing an option:
Go to your option group
Click on the option you want to configure
In the sidebar, find the relevant constraint section (Text Constraints, Numeric Constraints, etc.)
Enter your constraint values
Save your changes
The constraint section only appears for option types that support it. For example, Text Constraints only show for text input and paragraph text input options.
How Constraints Work
Constraints are validated in real-time as customers fill out the form
If a customer violates a constraint, they'll see an error message and cannot add the product to cart
All constraint fields are optional - leave them empty if you don't need restrictions
Constraints work together with the "Required" setting
Tips
Combine min and max values to create valid ranges (e.g., 5-50 characters)
Use step increments to simplify choices (e.g., quantities in multiples of 5)
For dates, set earliest_date to prevent past date selection
Test file upload constraints with various file sizes and types
Document your constraints in the option description for transparency