Line Attributes

Common Line Widths

The following table provides suggested line widths for ISO A4/A3/A2 or ANSI A/B/C paper sizes:

Line Weights Pen Size (mm) Purpose Recommended
Extra Thin 0.00, 0.05, 0.09
Hidden lines
Reference line
0.00 mm
Thin 0.13, 0.15, 0.18, 0.20, 0.25
Center lines
Dimension lines
Leader and extension
Phantom lines
Grid lines
0.18 mm
Medium 0.30, 0.35, 0.40, 0.50
Hidden lines
Text normal (0.30 mm)
Text - sub-headings (0.50 mm)
Visible object outlines
0.35 mm
Thick 0.70
Cutting lines
Match lines
Section lines
Text - titles/major headings
Viewing planes
0.70 mm
Extra Thick 1.00
Title sheet border

Note: Pen sizes shown in bold are ISO standard sizes.

Line Types

Standard line types

Image can be printed 1:1 using scale shown at bottom.