Watch's parts

As I say in my first post, I am very new to the world of watches. Let's go over some vocabulary:

Case size compared to wrist size (a strap should typically be half the size of the case):

Wrist SizeTypical Case SizeTypical Lug-to-Lug Size
5.5"–6.5"34–38 mm<46 mm
6.5"–7.5"39–42 mm<50 mm
7.5"+42–46 mm<54 mm