Honestly any filler will do, it's a matter of communicating your desire to your practitioner on what you're trying to achieve: for example, those with "baseball bat" style penises will likely want most of the filler at the base, tapering upward toward the glans. This can be achieved with
Hyaluronic Acid (
HA),
Radiesse,
Renuva, (your own) Fat,
Ellanse, or
PMMA; in other words, all viable penile fillers.