Each field on the integrated labels has a maximum amount of characters, see below for the limits per field.
First Name- 20 character max
Second Name - 20 character max
Company Name - 50 characters max
Address Line 1 - 100 characters max
Address Line 2 - 100 characters max
Town - 100 characters max
County - 30 characters max
Postcode - 10 characters max
Email Address - 100 characters max
Telephone Number - 20 characters max
Mobile Number - 20 characters max
What3words - 70 characters max
Shipment Reference - 50 characters max
Shipment Reference 2 - 30 characters max
Delivery Instructions - 250 characters max
Font Size
All text fields on the integrated labels are limited to a font size between 6-48.
For more information about creating new integrated labels, see here.