Data Type Nvarchar(MAX) In SQL Server 2005

nvarchar(max) I have a nvarchar(MAX) “Description” field in my SQL Server 2005 database. Somewhere I think I read that nvarchar(MAX) is the size of 4000. My question is in my Insert Stored Proc set ANSI_NULLS ONset QUOTED_IDENTIFIER ONGOALTER PROCEDURE [dbo].[syl_CodeScheduleTypeInsert]
  
            @ScheduleName
                        nvarchar(50),
    
            @ScheduleDescription
                nvarchar(????????)ASBEGIN
            -- SET NOCOUNT ON added to prevent extra result sets from
            -- interfering with SELECT statements.
            SET NOCOUNT ON;
            BEGIN TRY
                        INSERT I What number should replace the
  ???????? with? nvarchar(4000) is that correct? I tried nvarchar(MAX) and nvarchar but both versions only input one character into my database table. Please help a newbie out, cheers!