What distinguishes the size of a Small Pancake?

The defining characteristic of a Small Pancake is that it is specifically one small pancake in size. This option clearly describes the portion size that differentiates it from larger servings.

Other factors, such as being served with syrup or butter, do not specifically relate to the size of the pancake itself. Instead, those elements pertain to the toppings or accompaniments that may be offered with the pancake. Furthermore, describing it as a mini version of the Metro Pancake may imply a difference in size; however, it lacks specificity since the Metro Pancake itself could also have various serving sizes or styles. Therefore, the correct answer succinctly identifies that a Small Pancake is exclusively one smaller pancake, which is fundamental to understanding the menu item.