Most Scriptorium Pens are available in the following sizes, which are based on the outer diameter of the pen at the barrel threads:

• Small — 12.8mm/.5″ at the barrel threads
• Medium — 13.8mm/.54″ at the barrel threads
• Large — 14.8mm/.58″ at the barrel threads
• Oversize — 15.5mm/.60″ at the barrel threads

* * * Click Here for the Pen Dimensions Master Comparison Chart
* Other popular brands are listed at the end for comparisons.

* These are general sizes only. The barrel of any particular pen model may be much wider than the diameter at the threads or gripping section, or may taper to a much smaller diameter. * Please note that some pen models may not be available in oversize versions, depending on each particular design and availability of material.

★ Here is a list of some popular “store bought” pens and their diameters, with diameters of Scriptorium Pens below them:

• Pelikan M400 = 10.16mm or .4″
• Franklin-Christoph 02 Intrinsic = 11.3mm or .445″
• Pilot 823 or 845 = 12.7mm or .5”
• Pelikan M600 = 13mm or .5″
• Pelikan M800 = 13.4mm  or .527”
• Sailor Realo = 12.7mm or .5”
• Franklin-Christoph 065 Stabilis = 12.97mm or .51″
• Homo Sapiens = 13.9mm or .54”
• Aurora 88 & Optima = 15.2mm or .59”
• Naka-ai = 15.2mm or.59”
• Nakaya Piccolo = 15.24 mm or .6”
• M1000 = 15.24mm or .6”
• Sailor King of Pen = 15.24mm or .6”
• Montblanc 149 = 15.24mm or .6”
• Nakaya Dorsal Fin #2 = 17.8mm or .7”
• Namiki Emperor = 17.78mm or .7”

•   Small = 12.8mm (similar to Pilot or M800)
•   Medium = 13.8mm (similar to Homo Sapiens)
•   Large = 14.8mm  (closer to the MB 149, M1000, Aurora 88 or Naka-ai)
•   Oversized = 15.5mm

•      Small = 12.8 threads, 15.2 main barrel (similar to the Nakaya Naka-ai, Piccolo, etc.
•      Medium = 13.8 threads, 16.2 main barrel
•      Large = 14.8 threads, 17.2 main barrel (Similar to the Dorsal Fin v.2)
•      Oversized = 15.5mm threads, 18.2mm main barrel

Here’s a photo comparing some Scriptorium Pens to other brands you may be familiar with:

Pen Size Comparisons – Click for Larger Image

Left to Right: Lamy Safari, Balladeer – Large, Balladeer – Medium, Chronicler – Medium, Muse – Medium, Scribe – Medium, Edison Huron, Pelikan M805, Visconti Van Gogh Maxi, Parker 51, Pelikan M215.