What are the characteristics of an OAuth token?

Question

How many characters long can an oauth access token and oauth access secret be and what are the allowed characters? I need to store them in a d

Answer 1

To be specific, even if Oauth spec doesn't say anything, if you are using java and mysql then it will be 16 characters as we generally generate the tokens using UUID and store it as BINARY(16) in the database. I know these details as I have recently done the development using OAuth.