Epiploic foramen provides communication between greater and lesser sacs. The length of the epiploic foramen is:
High-Yield Explanation
The greater and lesser sacs communicate with each other through the epiploic foramen (of Winslow). The foramen is about 3 cm in size and situated opposite the 12th thoracic veebra. Ref: Moon D.A., Foreman K.B., Albeine K.H. (2011). Chapter 8. Serous Membranes of the Abdominal Cavity. In D.A. Moon, K.B. Foreman, K.H. Albeine (Eds), The Big Picture: Gross Anatomy.