Definitive answer the question - Subway 6" or footlong?

[NealBinnom-Williams]

The best part of a footlong is pretending half of it is for later.

Then you take one more bite, and another, and suddenly there's about three inches left. At that point it would be rude not to finish it.

[ProperJobs]

There's a case for the 6 inch if you're pairing it with soup or another side.

On its own though, it rarely feels like enough unless you've got a very small appetite.