You know when the “for size” picture features a dime the pen is going to be small. The Ohto Rook is the smallest pen I own.

I bought this pen specifically because I like small pens. I’ve been hauling it around as my new purse pen and other than it tends to fall to the bottom of purse pockets, it is doing quite well for that.

I’d previously bought a Kweco squeeze converter and thought it might fit this pen too. Nope. This pen is too small to use even that converter.

It really doesn’t have much for threads so I wouldn’t even attempt to do an eyedropper conversion on this little guy. It looks like it’s cartridges or nothing, but that’s OK. I’m using this as a travel pen.

The pen body is a very light aluminum and it is by far not only the smallest pen in length but in girth. It feels more like holding a pencil than a fountain pen in that fashion.

I’m not a fan of using pens with the cap on the back and this pen is no exception. It is super super tiny all by itself.

It’s almost too small, even for my hand. On the plus side it is even lighter than the Petit1 and being so small around I don’t seem to grip it quite as hard.

There’s nothing remarkable about how it writes, but there’s nothing wrong with it either. It’s a great little pen.

The Good

• tiny
• light
• very narrow grip
• standard cartridge

The Bad

• very short without cap
• not convertible in any way
• easily lost
• nothing to stop it from rolling off tables

Overall grade: B

I like it, but I don’t love it. I think the Petit1 beats it out on a practical (and cost) level, but the Rook’s narrow girth and lighter weight makes it have its own charm.