Download this ruler mm that can be easily printed out to measure lengths for different objects. You will find two rulers that have wood patterns on them.
Some printable paper rulers
Paper – 24 Frosting Sheets in Resealable Packaging 8.5” x 11”, Kosher Certified and Vegan-Friendly – White I - AliExpress
Some printable paper rulers
High Opaque Plastisol Ink – COLORS-QUART
After a year of working with students as they design object in TinkerCAD, I found that they have difficulty visualizing in mm and cm scale. Students
Printable Visual Reference mm Square and mm Ruler set for 3D printing & CNC
Free Printable Millimeter Ruler (Actual Size)
Printable Rulers
Ruler MM – Free Printable Paper
10 Sets of Free, Printable Rulers When You Need One Fast