Help Me Out For Storing More Data

CREATE TABLE [dbo].[blogs] (
[blog_title] [nvarchar] (500) ,
[blog_desc_full] [varchar] (8000) ,
[blogger_name] [nvarchar] (100) ,
[mailid] [nvarchar] (100) ,
[blogid] [numeric](10, 0) IDENTITY (1, 1) NOT NULL ,
[blog_desc] [nvarchar] (125) ,
[cat_name] [varchar] (100) ,
[b_url] [varchar] (250) ,
[b_date] [datetime] NULL ,
[author] [nvarchar] (250) ,
[approval] [char] (1)
) ON [PRIMARY]
GO

using this script i have created my blog table.

and a procedure given below. i am using to insert data in it.


CREATE PROCEDURE SP_BlogAdd

@blog_title nvarchar(500),
@blog_desc_full varchar(8000),
@blogger_name nvarchar(100),
@mailid nvarchar(100),
@blog_desc nvarchar(125),
@cat_name varchar(100),
@b_url varchar(250),
@author nvarchar(250)

AS

INSERT INTO blogs(blog_title, blog_desc_full, blogger_name, mailid, blog_desc, cat_name, b_url,author)
VALUES(@blog_title ,@blog_desc_full ,@blogger_name,@mailid ,@blog_desc ,@cat_name ,@b_url,@author)
GO

now, the problem i m facing is.
i am using varchar datatype for [blog_desc_full] [varchar] (8000).

i want more than this size to store data in it.

please give me some detailed code.

i tried text datatype but i didnt succeed. how to use text datatype.
i replaced with text datatype.but in length i couldnt type. it shows only 16.

Please help me out.

regards,
ASIF