My pen takes International size cartridges. What are these?

"International" size, "International Standard" or just "Standard" size cartridges are generally used in pens that do not take proprietary cartridges (ie not Lamy, Parker, Aurora, Sheaffer, Pilot/Namiki, Sailor or Cross). Standard size cartridges are 38mm (1.5in) long and taper towards the part that goes into the nib unit (grip section). Capacity of standard-size cartridges is approximately 0.8ml. They are made by, for example, Diamine, Herbin, Kaweco, Monteverde, Private Reserve, rotring, Visconti, Waterman and Yard-O-Led.
See also our Cartridge and Converter Compatiblity page.

The picture below shows Diamine standard size cartridges.

Diamine standard size cartridges


Testimonials ( 4222 )
(5,0/5)

Review By Billington,
Delighted to discover The Writing Desk as one of those people still passionate about pens. I needed ...
17-06-2018
Review By Margaret Finch,
Thank you! My order arrived very quickly and was well packed. The website was very easy to use and ...
16-06-2018
Verified Purchase
Review By andrew,
I dropped by the shop as I was nearby with my three tired TWSBI 530's, one with a broken cap, two wi ...
14-06-2018