What is "Medium Armor"?

The Blacksmith asks if I want light, medium or heavy armor. what equipment do you get if you choose medium?

When you make the choice, you get a shield, chest, legs, hands and boots according to:

Choice | Shield                | Chest               | Legs, Hands, Boots
Light  | Imperial light shield | Imperial light      | Imperial light
Medium | Imperial shield ^1    | Imperial studded ^2 | Imperial light
Heavy  | Imperial shield ^1    | Imperial heavy      | Imperial heavy

Note¹: The Imperial shield is a heavy armor item.

Note²: The Imperial studded chest is a light armor item.

There is no Medium Armor* in Skyrim, the only available types are Light and Heavy Armor.

The blacksmith was meaning by medium armor a mixture of light and heavy armor.

*: Morrowind had medium armor, but it was not very practical.