Pens and Pencils | Reviews and Data

Twsbi Diamond Mini Fountain Pen

The Twsbi Diamond Mini is a mid-range fountain pen that is basically a smaller version of the company’s Diamond 580.

The Diamond Mini is sold in a few different varieties including: the Classic, AL, and Clear. There differences between them are quite minor:

  • Diamond Mini Clear: Clear plastic cap and section
  • Diamond Mini Classic: Opaque black cap and section
  • Diamond Mini AL: Clear cap with aluminum section. Sells for about $10 more than others

Twsbi says that this small piston filler is about the size of an iPhone 5 when capped. That might have been a useful reference point in 2015 but it isn’t much help now! Then is about 4.5 inches long capped, or about an inch shorter than the standard Diamond 580. The Diamond Mini is in keeping with the popular Twsbi Vac Mini and Vac700R‘s relationship to one another.

Twsbi Diamond Mini Fountain Pen Information

Street Price Check Price
Manufacturer TWSBI
Pen Type Fountain Pen | Piston (built-in)
Barrel Color Clear
Barrel Material Plastic
Body Diameter (mm)14.6
Grip Color Silver
Grip Material Metal (Aluminum)
Grip Diameter (mm)10.7
Country of Origin Taiwan
MSRP $54.00
Still Sold Yes
Similar To
Capped? Retractable?Capped - Screw On
Length Capped / Retracted (cm)11.2
Length Posted (cm)13.9
Length Uncapped (cm)10.2
Weight (g)22.0
Nib MaterialSteel
Nib ColorSilver
Nib SizesExtra Fine, Fine, Medium, Broad, 1.1 mm Stub