LEAD SIZES FOR MECHANICAL PENCILS

Since their beginnings in the early 19th century, the mechanical pencil (sometimes called a propelling pencil) has come a long way. With advancements in technology allowing for stronger, more robust ‘leads’ and continual improvements to the internal gripping mechanism, mechanical pencils have become the handy go to for all occasions; enabling both technical precision, and artistic flair.

Mechanical pencils have diversified over the years to hold a range of different lead sizes. The lead size will affect what your pencil will be best for.

We have outlined the 10 most commonly used lead sizes for mechanical pencils; what they look like, feel like, what they are good for and which products you should choose for this size lead.

A line drawn with 10 varying lead widths.This picture shows the line widths of lead sizes from 0.3mm to 5.6mm.

 

SIZE: 0.3MM

0.3mm lead writing

0.3mm leads are the thinnest of the lead sizes currently available. As this size is generally used for technical drawings and finer details they are usually available in HB or harder, but softer graded leads can be found. The 0.3mm HB was hard to write with, as there was no give in curves. This size was excellent for drawing straight lines, especially when aided by a ruler. The effect was clean and precise.

 

SIZE: 0.5MM

0.5mm lead writing

This is a popular lead size with many companies creating mechanical pencils designed for 0.5mm leads. However several companies have recently changed their standard size from 0.5mm to 0.7mm e.g. Cross. The fine line is suitable for both writing and technical drawing. Like 0.3mm leads these are more commonly found in HB and harder.

 

SIZE: 0.7MM

0.7mm lead writing

0.7mm is the most common lead size used for mechanical pencils. The writing style matches closely to the size of a fine ballpoint or rollerball, and is available in the widest array of hardnesses. The lead thickness is great for day to day writing, sketching and can be used for less detailed technical drawings. Very pleasant to use.

OUR PICK:

Faber-Castell Ambition Pearwood Pencil
The sumptuous wood barrel of the Faber-Castell Ambition Pearwood coupled with the highly polished chrome trim makes this pencil a statement piece with real wow factor. Faber-Castell have a true pedigree when it comes to making fine writing instruments, with origins in the beginning of the 20th century and this pencil.

 

SIZE: 0.9MM

0.9mm lead writing

0.9mm leads are similar to a medium width writing point pen. 0.9mm was the standard size for mechanical pencil leads from the late 1940’s till around 1980. The size allows for writing and drawing strong, solid lines and lends itself well to sketching.

 

SIZE: 1.18MM

1.18mm lead writing

1.18mm (Sometimes known as 1.1mm or 1.2mm) were the standard size for mechanical pencils way back when they first became popular. As this size was used in the very first Yard-O-Led pencils, the company has made a conscious decision to maintain the size throughout the years. This size is similar to a broad point pen, and can feel slightly cumbersome for smaller handwriting.

 

SIZE: 1.4MM

1.4mm lead writing

1.4mm is the last size of lead that is really suitable to write with. Past this width the letters can be difficult to draw and need to be simplified to ensure they are legible, however this does mean that 1.4mm leads are perfect for young children as it encourages them to write large clear letters. The lead width also ensures a solid and consistent line.

SIZE: 2.0MM

2.0mm lead writing

From 2.0mm upwards your lead may need sharpening in order to get the effect you are after. The 2.0mm size is cumbersome and was not pleasant to write with, but to sketch it was a pleasure. Great for shading. Press hard for strong dark lines and softly for smooth shades.

 

SIZE: 3.0MM & 3.2MM

3.0mm lead writing

3.2mm lead writing

These two lead sizes are so similar it is hard to tell them apart. 3.0mm and 3.2mm leads usually come sharpened in the pencil and will need to be sharpened depending on your preference. This size is great to sketch with and for shading. Press hard for strong dark lines and softly for smooth shades.

 

SIZE: 5.6MM

5.6mm lead writing

The largest of the common lead sizes. This chunky sized lead will need regular sharpening. It’s prowess lies in shading and sketching larger objects. Press hard for strong dark lines and softly for smooth shades.

 

annotated landscape drawing

The picture above was drawn using all of the aforementioned lead sizes.


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