Agent 6 has returned from sunnier climes and passes on the results of a women's survey on size. Here's how random ladies responded.
2 inches - I can't even hold it.
3 inches - Never been so unsatisfied.
4 inches - I've had bigger.
5 inches - Good, but I wish a bit bigger.
6 inches - Perfect.
7 inches - Love it.
8 inches - Wow! But can't have it all.
9 inches - A lot, but manageable.
10 inches - Too much pressure on stomach, fills me up.
These were actually (Agent 6 swears) the results of a customer feedback survey of... wait for it... different sizes of Subway sandwiches!