How to Draw Perfect 25cm Straight Lines Without a Ruler

Before beginning this tutorial, I suggest you to refer to “Be a pro at dot-to-dot mastering straight lines”

HOW DO I DO 25 CM STRAIGHT LINES

Turn the paper 45 to 60 degrees. Adjust it to your convenience.

Before drawing the line, simulate the gesture just above the paper*.

Draw using the movement of your whole arm and chest.

Draw parallel lines along the edges of the sheet, both widthwise and
lengthwise.

Check your lines carefully using the edge of another paper as a guide.

this step is called “ghost drawing”

Flip your paper, and retrace the slanted line using the “ghost drawing”. Your line should be much better.

That movement may not seem natural to your arm (rotating by default). However, try to memorize and reproduce that same line covering the entire paper.

TIP

Breath out when you trace the line

After mastering A4 paper length, get ready for the A3 paper, 42cm in length !
Try it and let me know of your results in the below comment box.

3 comments

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How to Draw Straight Lines (No Ruler) – ✏️THE DESIGN SKETCHBOOK says:

May 5, 2025 at 11:07 am

[…] In the next article, we’ll talk about drawing straight lines of 25cm and more. […]

Reply
Kurigoku says:

October 4, 2015 at 9:55 pm

I really appreciate the tips! I will be doing them all until I become an expert :D

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- Chou-Tac says:
  
  October 6, 2015 at 1:29 am
  
  Enjoy Kurigoku. That’s exactly the right mindset. Master it till it become a habit :)
  
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