10mm width line

can i have a line of 10mm in my plugin?

Birpal Kaur wrote

can i have a line of 10mm in my plugin?

Explain your problem or objective in detail.

I am creating a plugin and want to use lines of different widths. But I am unable to create them.
On plotting different line width it seems to be remain same i.e visually there is no difference.
http://screencloud.net/v/bCyf
in this left line is of .05mm and right side of line is of 2.11mm but visually no difference