TWSBI Diamond Mini Classic Expand

TWSBI Diamond Mini Classic

1 Review(s)



  • Pocket pen
  • Full length when cap posted
  • Black cap and transparent barrel

More details

Availability: Sorry, out of stock

£ 46.98

More info

A shorter, pocket-sized version of the TWSBI Diamond 580 fountain pen. The barrel is shorter than the standard Diamond series pens but the cap can be posted by screwing onto the end of the barrel to create a full-size pen. TWSBI's philosophy is to promote traditional aspects of owning and using a fountain pen so full instructions, a wrench and a vial of silicone grease are provided to enable easy maintenance by the user.

This pen only fills from an ink bottle (we keep lots of ink in stock to choose from).  The Diamond Mini can be filled from any fountain pen ink bottle, but for clean and easy refilling, try a TWSBI Diamond 50 Ink Bottle which is specially designed for refilling Diamond series fountain pens. 

Replacement Diamond mini nib units are available in extra fine, fine, medium, broad and 1.1mm italic.

Presented in an attractive clear plastic case with a clean modern design. For protection the case comes in a cardboard box to protect the pen and case in transit. 

Note that the nib section of the Diamond Mini is not compatible with other TWSBI fountain pens (eg. Diamond 540, Diamond 580, Vac 700 and Micarta).  See our reference section for more details on TWSBI nibs.




Thread design

I love this little beauty. Just posting here to say that a really nice touch is the design of the thread: all it takes to remove/fix the cap from/to either end is just one (appropriately mini) turn. Impressively smart attention to such a minor detail.

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    TWSBI Diamond Mini Classic

    TWSBI Diamond Mini Classic


    Length Capped = 117 mm

    Nib length = 19.6 mm

    Section length = 19 mm

    Section diameter (max/min) = 10.0/9.4 mm

    Barrel diameter (max) = 12.7 mm

    Total length (not posted, including nib) = 107.8 mm

    Total length posted (including nib) = 139.6 mm

    Weight = 20 g

    Shipping cost and availability

    Shipping cost
    UK postage is FREE over £35 but otherwise starts at £1.80 for small items (converters, refills etc) or £3.30 for ink, stationery etc.

    Overseas shipping starts at only £4.00. The exact cost varies by price, weight and delivery country so to find out your final shipping cost just add the item to your shopping basket and select the delivery country. You don't have to enter any personal details - just an e-mail address but this isn't stored unless you create an account. We offer a choice of shipping services from Royal Mail and DHL.

    VAT (at 20%) is automatically taken off for destinations outside the UK. Note that if you are ordering within the EU you will have to pay VAT when your parcel arrives.

    If an item is in stock, the words "In stock" will be shown. If an item is out of stock, the approximate number of days before we get another delivery will be shown instead. You may still be able to order the item, but there will be a delay before we can dispatch your item(s). If the words "Please enquire" are shown, it's best to check with us first before ordering.

    Nib choices for fountain pens
    If we show the pen with the default nib selection shown in stock it means we have stock of that pen. If you select another nib size and the website doesn't say "in stock" we can usually supply that pen immediately as we keep extensive supplies of nibs from all our manufacturers.