How to know the max length of Eloqua element via Bulk API

Hi Guys,

I got one question

Now I could use, e.g. GET /contacts/fields, to retrieve all fields of Contact; however in the list, it does not show the max length of each field, so I do not how to define my database table used to save Eloqua data

Like below

        {

            "name": "FirstName",

            "internalName": "C_FirstName",

            "dataType": "string",

            "hasReadOnlyConstraint": false,

            "hasNotNullConstraint": false,

            "hasUniquenessConstraint": false,

            "statement": "{{Contact.Field(C_FirstName)}}",

            "uri": "/contacts/fields/100002",

            "createdAt": "1900-01-01T05:00:00.0000000Z",

            "updatedAt": "2012-10-01T18:05:00.9000000Z"

        }

If I want to create a DB table having column [C_FirstName], what precision should I give?

Thanks~