Quick answer: choose a fineliner by the job you want the line to do. Start with one everyday outline pen, add a finer pen for details and use a broader pen for emphasis. Read the stated millimeter width and tip shape together: a size code on its own is not a universal measurement.
1. Read the label before comparing the numbers
A fineliner label may show a size code, a width in millimeters or a tip name such as brush. Those labels answer different questions. A millimeter value describes a stated size; a code identifies a size within that manufacturer's range; a tip name describes its shape or behavior.
For example, Royal Talens lists Sakura Pigma Micron 005 as 0.20 mm. That example belongs to the Micron range. It is not a conversion chart for JusArt or a reason to read every pen marked 005 as the same width. Look for the width and set details on the exact product you are buying.
Also separate pen count from fixed line widths. The JusArt 12-tip black drawing pen set includes a selection of sizes and styles, including ultra-fine, fine, brush and chisel tips. A brush or chisel option should not be treated as another fixed-width fine point.
2. Give each line a role
You do not need to use every pen in a set on one drawing. Try a small working group with a clear purpose for each tool. The choices below are starting points for practice, rather than measured line-width recommendations.
| What you want to make | Start by comparing | Check on your practice sheet |
|---|---|---|
| Small facial features, leaf veins or tiny patterns | The finer fixed-point options | Do neighboring marks stay separate at the size you will draw? |
| Sketch outlines, journal headings or everyday drawing | A comfortable middle option in your set | Can you read the shape without making every edge equally dark? |
| A stronger outer contour or a small dark accent | A broader fixed point or suitable chisel edge | Does the heavier line support the focal shape without hiding it? |
| Lettering with changing stroke width | A brush tip or a chisel tip used at different angles | Can you repeat the stroke comfortably without forcing the tip? |
For a first illustration, keep the main outline readable, use the finer option inside the shape and reserve the broader one for a few deliberate accents. If everything looks equally heavy, change the line hierarchy before buying more pens.
3. Make a comparison card on your own paper
A useful size chart is one you can refer to while working. Use the same paper as your project and keep the labels from your actual pens. This exercise is a way to choose your tools; it is not a published measurement test.
- Label a row for each pen. Copy its code, stated width and tip name exactly. Leave a blank if a measurement is not supplied instead of guessing a conversion.
- Repeat the same four marks. Draw a short straight line, a curve, a small circle and a patch of parallel hatching with each pen.
- Add your real task. Write a word at your journal's usual size, draw a small eye or add a leaf vein. An isolated line can look different from a crowded detail.
- Choose three roles. Mark your detail, outline and emphasis choices. Keep the card beside your sketchbook rather than trying to remember every number.
Compare with a relaxed hand. Sakura's technical FAQ explains that the line left on paper can vary with pressure, paper and writing speed. If one pen seems inconsistent, repeat the mark with a lighter touch on the same sheet before deciding that its printed size is wrong.
4. Match the ink and paper to the next step
If you plan to add watercolor or color over the drawing, make a second sample with that exact combination. Draw a few lines, let the ink dry fully according to the product guidance, then apply the medium you will actually use. Check the sample before working over a drawing you want to keep.
JusArt describes the 12-tip set as black pigment ink with water-resistant results once fully dry. Its product guidance also calls for a small test because paper and drying conditions affect the result. This guide does not establish a universal drying time or claim that every wet medium is compatible.
For marks showing on the reverse of a page, use our paper and bleed-through troubleshooting guide. For a wider comparison of brush, fine and chisel formats, see the beginner's guide to marker tips.
Before you choose a set
- Mostly detailed line drawing? Prioritize a useful selection of finer and everyday fixed points.
- Drawing plus lettering? Check whether brush or chisel styles are included, rather than judging the set only by its pen count.
- Adding watercolor? Read the ink description and make a dry-ink compatibility sample on your paper.
- Replacing one favorite pen? Match its exact product description and stated size; a similar-looking code from another range may not be equivalent.
Explore JusArt fineliner pens, or compare the actual contents of the 12-tip black drawing pen set before ordering.
Common questions
Does 005 mean a 0.005 mm line?
Do not infer that conversion from the code. The official Micron example above pairs 005 with 0.20 mm. For another product, use its own stated width or ask for the specification.
Do I need the smallest tip for detailed drawing?
Not automatically. Try the detail at its final size. A slightly clearer line may suit your paper and drawing better than the finest option, especially when several marks sit close together.
Can a brush tip replace all my fixed points?
It offers a different way to work. A brush helps you vary strokes; several fixed points let you change line weight by changing pens. Compare the marks you need instead of treating one format as a universal replacement.
Is this a measured JusArt millimeter chart?
No. It is a selection and practice guide. It does not assign unverified millimeter widths to JusArt size codes or report physical tests we have not performed.
Sources and scope
Product details checked October 27, 2026: JusArt 12-tip set listing. Technical references: Royal Talens' official Micron sizes and Sakura of America FAQs. Manufacturer information about another brand is used only to explain label reading and line behavior, not as proof of JusArt performance.