Random access file variable length

[scratchmyhead]

I'm creating a random access file. When counting the different variables to get the length of the file, how much should I enter for a date variable?

For example

type guest
name as string * 20
address as string * 30
arrivaldate as date
end type
dim g as guest

The name and address is simple but how much should I reserve for the date variable?

[DataMiser]

You are using a Type so you can simply get the length of the type

Open Filename for Random as #1 len=Len(g)

a date data type is 8 bytes if I'm not mistaken