Is it 32 bit, or 64 bit or 128 bit or bigger?
['https://Stackoverflow.com/questions/861911', 'https://Stackoverflow.com', 'https://Stackoverflow.com/users/106866/']
The reason for the extra 8 characters in the database vs what you get in code is the application id. In the database the session is appended with the tempApplicationID from ASPStateTempApplications table. This is why you get 24 characters in code, and 32 in the db.
Because it's generated as a [System.Guid](http://msdn.microsoft.com/en-us/library/system.guid(VS.90).aspx) Valuetype, it's a 128-bit integer, which is 16 bytes.