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Quick answer
The Magna Carta Mag 600 is a large resin fountain pen from Indian maker Magna Carta, built around a #6 14k gold True Flex nib and an ebonite feed, styled on 1920s hard-rubber pens. It fills by cartridge, converter or eyedropper. Goulet measures 149.6 mm capped and 27 g; Galen says the nib flexes from EF to BBB.
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The Mag 600 with the cap off, at Goulet's 137.5 mm, drawn at 1 mm = 5 px. Goulet and Magna Carta advise against posting.
Product facts
Product
Magna Carta Mag 600 fountain pen, 14k True Flex nib
Resin body (stacked resin on the Goulet Azure), 24K PVD gold-plated trim, 14k gold nib, ebonite feed (Magna Carta, Goulet)
Released
2023*
Price range
$$$$over $75 per pen (multi-packs divided by the count)
Colors
Verde Royal
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Notes on these facts
Made in India: Galen Leather describes Magna Carta as a fountain pen manufacturer from India that makes pens, nibs and resins in-house. Magna Carta's own About page says the company began in western India and makes its nibs, ebonite feeds and materials in its own workshop, and that from 2026 its headquarters, design and select assembly are in the United States. Check the box for your pen. Source. Price: example listing. Released: Galen Leather says Magna Carta unveiled the Mag 600 in 2023; Magna Carta's own pages don't give a year.
Colors: names per Magna Carta, checked October 24, 2026. Finishes of the gold-nib Mag 600 in Magna Carta's own shop (22 product pages); the steel-nib Mag 600 S shares many of them and adds aluminium, Sunset, Twilight, Thunder and a show-exclusive Multi Color. Tints were sampled from Magna Carta's product photos; for multicolor resins the two tints are the two main colors. Tints are representative, not measured. Shops stock different colors.
Price bands are typical US retail, checked October 2026.
Key takeaways
Magna Carta lists the Mag 600 at 146 mm long with a 15 mm barrel; Goulet measures 149.6 mm (5.9 in) capped and 27 g.
Galen Leather says the 14k True Flex nib starts at extra fine and spreads to about triple broad (BBB) under pressure.
On October 22, 2026 Goulet's Mag 600 Azure was 23rd on its best-seller list, though its 6 reviews averaged 3.33 out of 5.
Magna Carta's own shop listed more than 20 Mag 600 finishes on October 22, 2026, plus a steel-nib Mag 600 S, all in our $$$$ band (over $75).
Galen says Magna Carta was founded in 2014 and unveiled the Mag 600 and Mag 1000 as flagship models in 2023.
What is the Magna Carta Mag 600?
It’s a large resin fountain pen built around a soft, highly flexible 14k gold nib, the kind most modern pens no longer offer. Magna Carta calls it the True Flex nib and pairs it with an ebonite feed that can keep up with wide strokes.
Galen Leather says the design is inspired by 1920s hard-rubber pens, with a riveted clip, and that Magna Carta unveiled the Mag 600 in 2023. Interest is rising: on October 22, 2026 Goulet’s exclusive Mag 600 Azure was 23rd on its best-seller list.
Magna Carta Mag 600 specs
Spec
Mag 600
Length capped
149.6 mm (5.9 in), Goulet; 146 mm (5.7 in), Magna Carta
Body length (with nib)
137.5 mm (5.4 in)
Diameter
14.5 to 15 mm barrel, 16.4 mm cap, 20.9 mm with clip
Grip
10.4 to 10.7 mm
Weight
27 g (15 g body, 12 g cap)
Nib
#6 14k gold True Flex, about EF to BBB
Feed
Ebonite
Filling
International cartridge, converter, eyedropper
Ink capacity
1.01 ml converter, 1.55 ml cartridge; eyedropper 5.15 ml (Goulet) or 7.25 ml (Galen)
Cap
Screw-on, 2 turns; not for posting
Most figures are Goulet’s measurements of the Azure. Magna Carta lists a 146 mm length, which we give alongside; the eyedropper capacity differs between Goulet and Galen, so we show both.
The pen to scale, and the line range Galen gives for the True Flex nib (schematic, not measured).
How flexible is the True Flex nib?
Very: Galen says it starts at extra fine and opens to about triple broad under pressure, like a vintage flexible gold nib. That range is what lets it draw thin upstrokes and thick, swelling downstrokes in copperplate-style writing.
Galen also warns that flex writing takes effort and patience and may not suit everyone, and that gold flex nibs are harder to make and more prone to defects, so Galen inspects each pen before it ships.
How do you fill and care for the Mag 600?
Use cartridges, the converter or eyedropper filling, and let the ebonite feed soak. Galen says to fill by immersing the whole nib in the bottle and leaving the feed there for a while, so the ebonite absorbs ink before you write.
Magna Carta says it makes its ebonite feeds in-house. If you’d rather use a firm nib some days, Galen says the housing takes JoWo #6 nibs; our fountain pen nib sizes guide explains flex and stub nibs.
Which Mag 600 should you choose?
Choose the gold nib for real flex, or the Mag 600 S if you want a cheaper way to try it. Magna Carta’s own shop listed both on October 22, 2026.
Mag 600: #6 14k gold True Flex nib, 24K PVD gold trim, from US$385 to US$550 depending on the material (resin, ebonite, copper or titanium).
Mag 600 S: #6 F-Flex stainless steel nib on the same body, from US$250 (aluminium) to US$330.
Goulet Azure: a Goulet-only special edition in stacked blue and black resin with the 14k nib.
How does it compare with other soft-nib pens?
It flexes much further than Pilot’s soft nibs, and it’s a bigger, heavier pen. Figures for the Falcon come from our guide.
The Falcon is the safer choice for everyday writing with a little bounce. The Mag 600 is for people who want vintage-style line variation; for broad-edge lettering instead, see our calligraphy pens for beginners.
Where is the Magna Carta Mag 600 made?
In India, by Magna Carta’s own workshop, according to Galen and the maker. Galen describes Magna Carta as an Indian manufacturer that makes its pens, nibs and resins in-house. Magna Carta says its roots are in western India and that from 2026 its headquarters, design and some assembly are in the United States, so check the box on newer pens.
Frequently asked questions
Is the Magna Carta Mag 600 a real flex nib?
Magna Carta calls it a True Flex nib and Galen compares it to vintage flexible gold nibs, spreading from about EF to BBB. It needs a light, controlled hand, and Galen warns that flex writing takes patience.
How do you fill a Magna Carta Mag 600?
With a standard international cartridge, the included converter, or as an eyedropper. Galen advises dipping the whole nib in the bottle when filling so the ebonite feed soaks up ink.
Can you post the Mag 600 cap?
Not recommended. Goulet lists it as not postable, and Galen says the cap will post but the pen is balanced to write without it.
What is the Mag 600 S?
The steel-nib version. Magna Carta's shop describes the Mag 600 S with a handcrafted #6 F-Flex stainless steel nib on the same Mag 600 body, at a lower price.
Can you put a JoWo nib in the Mag 600?
Galen says the nib housing is compatible with JoWo nibs, so a standard #6 JoWo unit should fit if you want a firm nib.
Is the Magna Carta Mag 600 good for beginners?
Usually not as a first pen. Galen says flex writing takes effort and patience, and Goulet's six reviews of the Azure average 3.33 out of 5, so try a firm nib first.
Is Magna Carta an Indian company?
It began in India. Magna Carta says its roots are in western India, and from 2026 its headquarters, sales, design and some assembly are in the United States.
