That's hilarious! You want to store a jpg in your database without "bothering" with "any binary data type stuff". And you're worried about how much space it will take up. Something here just isn't adding up.
Let's take a step back. Why are you storing images in your database? In my experience this is a bad idea 100% of the time. Instead, store your images on disk and store the path in the database. If you have multiple servers use NFS or even Amazon S3 to store the file. But not your RDBMS - that's not what it's for.