Just a line:

A line 100% size, left aligned:

A Line 50% size, left aligned:

A Line 10% size, left aligned:

A Line 10% size, right aligned:

A Line 10% size, centered:

A line 10% size, centered, thin:

A line 10% size, centered, medium:

A line 10% size, centered, thick:

A line 10% size, centered, very thick: