Beyond the number of tracks, it is the music length of your project that matters! This will determine the size of the vinyl that best fits your project.
Indeed, vinyl records can contain:
Up to 22 minutes of music per side on a standard 12" vinyl;
9 minutes for a 10" vinyl;
And 5 minutes for a 7" vinyl.
Of course, this can multiply with the number of vinyl records you want to incorporate into your project.