The below represent the character limits of fields within Fieldmagic. Any field not mentioned, will not have a defined character limit.
| Module | Field | Max Length (characters) |
| Customer Invoices | External ID | 64 |
| Customer Invoices | Invoice Number | 32 |
| Customer Invoices | Accounting ID | 64 |
| Customer Invoices | PO Number | 100 |
| Customer Invoices | Job Stage | 32 |
| Time Entries | External ID | 64 |
| dashboards | Name | 64 |
| Import | Module | 64 |
| asset_groups | External ID | 64 |
| asset_groups | Name | 128 |
| Contact Opportunities | External ID | 64 |
| Contact Opportunities | Role | 64 |
| crew_users | External ID | 64 |
| API Keys | Name | 64 |
| Crews | External ID | 64 |
| Crews | Name | 128 |
| Recurring Invoices | External ID | 64 |
| Recurring Invoices | Invoice Summary | 500 |
| Recurring Invoices | Period | 32 |
| Recurring Invoices | PO Number | 100 |
| Recurring Invoices | Invoice Date | 32 |
| Recurring Invoices | Due Date | 32 |
| Project Templates | External ID | 64 |
| Project Templates | Project Name | 128 |
| Files | External ID | 64 |
| Files | File Name | 256 |
| Account Codes | External ID | 64 |
| Account Codes | Name | 64 |
| Account Codes | Code | 36 |
| Tax Codes | External ID | 64 |
| Tax Codes | Name | 64 |
| Tax Codes | Code | 36 |
| Document Templates | Name | 120 |
| Document Templates | Module | 64 |
| Document Library | External ID | 64 |
| Document Library | Document Name | 64 |
| Purchase Orders | External ID | 64 |
| Purchase Orders | PO Number | 32 |
| Purchase Orders | Job Number | 100 |
| Purchase Orders | reference | 64 |
| Purchase Orders | Job Stage | 32 |
| Purchase Orders | Tax Code | 32 |
| Purchase Orders | Accounting ID | 64 |
| Contacts | External ID | 64 |
| Contacts | Department | 64 |
| Contacts | First Name | 64 |
| Contacts | Last Name | 64 |
| Contacts | Job Title | 64 |
| Customers | External ID | 64 |
| Customers | Customer Accounting ID | 64 |
| Customers | Supplier Accounting ID | 64 |
| Customers | Name | 128 |
| Customers | Quote Invoice PDF | 64 |
| Customers | quote_terms | 64 |
| Customers | Tax Number | 32 |
| Customers | Customer Number | 32 |
| Customers | Supplier Number | 32 |
| Customers | First Name | 64 |
| Customers | Last Name | 64 |
| assets_jobs | External ID | 64 |
| Quotes | External ID | 64 |
| Quotes | Quote Number | 100 |
| Asset Types | External ID | 64 |
| Asset Types | Name | 64 |
| Asset Types | Application Standards | 128 |
| Departments | External ID | 64 |
| Departments | Department Name | 64 |
| Filters | Name | 128 |
| Filters | Module | 32 |
| Supplier Invoices | External ID | 64 |
| Supplier Invoices | Accounting ID | 64 |
| Supplier Invoices | Tax Code | 32 |
| Supplier Invoices | Invoice Number | 32 |
| Activities | External ID | 64 |
| Activities | Activity Name | 128 |
| Activities | From | 128 |
| dropdowns | Module | 32 |
| dropdowns | Name | 32 |
| Items | External ID | 64 |
| Items | Code | 64 |
| Items | Name | 128 |
| Items | Accounting ID | 64 |
| Materials | External ID | 64 |
| Materials | Product | 128 |
| Materials | Type | 128 |
| crew_resources | External ID | 64 |
| access_levels | Job Title | 64 |
| Leads | External ID | 64 |
| Leads | First Name | 32 |
| Leads | Last Name | 32 |
| Leads | Company | 64 |
| Leads | Job Title | 64 |
| Job Skills | External ID | 64 |
| Job Skills | Name | 128 |
| Jobs | External ID | 64 |
| Jobs | PO Number | 100 |
| Jobs | Sub Status | 64 |
| Jobs | Work order number | 100 |
| PriceBooks | External ID | 64 |
| PriceBooks | Name | 32 |
| Resources | External ID | 64 |
| Resources | Name | 64 |
| user_invitations | E-Mail Address | 64 |
| Contact Customers | External ID | 64 |
| Contact Customers | Role | 64 |
| Opportunities | External ID | 64 |
| Opportunities | Project Name | 128 |
| Opportunities | Stage | 64 |
| Opportunities | Reason for Lost | 64 |
| Quote Templates | quote_name | 100 |
| System Settings | Name | 64 |
| System Settings | alias | 64 |
| System Settings | Prefix Customer Invoice | 8 |
| System Settings | Prefix Supplier Invoice | 8 |
| System Settings | Prefix Purchase Order | 8 |
| System Settings | Prefix Customer | 8 |
| System Settings | Prefix Supplier | 8 |
| System Settings | default_tax_code_purchase | 64 |
| System Settings | Set a default account code for purchases | 64 |
| System Settings | default_tax_code_sale | 64 |
| System Settings | Set a default account code for sales | 64 |
| System Settings | Set a default product for accounting sync | 64 |
| System Settings | Invoice Due Date | 32 |
| System Settings | accounting_system_id | 50 |
| Recurring Jobs | External ID | 64 |
| Recurring Jobs | Period | 32 |
| Recurring Jobs | PO Number | 128 |
| Recurring Jobs | Due Date | 32 |
| Pricebook Items | External ID | 64 |
| Pricebook Items | Name | 128 |
| Checklists | External ID | 64 |
| Checklists | Name | 128 |
| Sites | External ID | 64 |
| Sites | Tenant | 64 |
| Contact Sites | External ID | 64 |
| Contact Sites | Role | 64 |
| Assets | External ID | 64 |
| Assets | Serial Number | 64 |
| Assets | Level | 64 |
| Assets | Location | 128 |
| Users | E-Mail Address | 64 |
| Users | Nickname | 32 |
| Users | First Name | 32 |
| Users | Last Name | 32 |
| Users | Name | 128 |