Midori Book Band Pen Case: Pen Holder for B6

Black Midori Book Band Pen Case strapped to the cover of an A5 notebook, drawn to scale at 183 mm tall, with a close-up of the adjuster on the elastic band — The Book Band Pen Case (183 mm) on an A5 notebook (210 mm), drawn to one scale.

Product facts

Product: Midori Book Band Pen Case for B6–A5, Black A (41821006)
Brand: Midori
Brand origin: Japan
Made in: Not stated^*
Material: Cotton and polyester blend fabric, zip, elastic band with adjuster (Midori)
Price range: $$$5–20 per case
Rate it: No ratings yet. Be the first to rate this product.

Notes on these facts

Made by Designphil Inc. (Tokyo). Country of manufacture not stated: Midori's Japanese online store pages for the Black A and Clear A (read in full on October 22, 2026) and Amazon US don't state a country of manufacture. Check the tag or package. Price: example listing.
Price bands are typical US retail, checked October 2026. Conversions to US dollars are approximate, at October 2026 rates (US$1 = ¥158 = ₩1,330 = NT$32.5 = CN¥6.7 = SEK 9.9 = DKK 6.7 = ₺49.6 = C$1.41 = A$1.43 = CZK 21.7; €1 = US$1.12; £1 = US$1.32; CHF 1 = US$1.21).

Key takeaways

Midori lists the fabric Black A at 183 × 55 × 20 mm (7.2 × 2.2 × 0.8 in) in a cotton and polyester blend.
The adjustable elastic band fits notebooks from B6 to A5, per Midori.
The fabric version holds up to 4 thick pens; the clear non-phthalate PVC version holds up to 7.
Midori's Japanese store lists Black A at ¥1,848 (about US$12) and Clear A at ¥1,518 (about US$9.60).
Black A had 175 ratings on Amazon US on October 22, 2026, and JetPens recommends it in its pencil case guide.

What is the Midori Book Band Pen Case?

It’s a narrow zip pen case sewn onto an elastic band that you stretch around a notebook cover, so your pens ride on the notebook. Midori, the Japanese stationery brand of Designphil, sells it for B6 to A5 notebooks and planners.

JetPens recommends the Book Band Pen Cases in its pencil case guide as the case that slips over a notebook cover. On Amazon US the Black A had 175 ratings when we checked on October 22, 2026.

Midori Book Band Pen Case specs

Spec	Value
Brand	Midori (Designphil Inc., Tokyo)
Model	Book Band Pen Case for B6–A5, Black A (41821006)
Size	183 × 55 × 20 mm (7.2 × 2.2 × 0.8 in) (Midori)
Package	228 × 82 × 27 mm (9.0 × 3.2 × 1.1 in) (Midori)
Material	Cotton and polyester blend (Midori)
Capacity	Up to 4 thick pens (Midori)
Fits	B6 to A5 notebooks, adjustable band (Midori)
Japan list price	¥1,848 (about US$12)
Price band	$$ ($5–20)
Made in	Not stated

Midori Book Band Pen Case drawn to scale beside B6 and A5 notebook outlines — The 183 mm case against B6 and A5 covers, the range Midori says it fits.

How does the Book Band Pen Case attach?

With an elastic band that has a length adjuster, so you can tighten it around anything from a B6 to an A5 notebook. You slide the cover through the band; the case sits along the outside of the front or back cover.

At 183 mm tall, the case is about as tall as a B6 page (182 mm) and a little shorter than an A5 page (210 mm). That’s why Midori stops at A5: on a taller notebook the band would sit too high or too low.

How many pens does it hold?

Up to 4 thick pens in the fabric version. Midori says the stretchy fabric gradually takes on the shape of the pens in the pocket the more you use it.

Inside, the pen pocket has a flap cover with a non-slip finish to stop pens falling out. If you don’t need the flap, Midori says you can tuck it into the pocket so pens come out more smoothly.

Which Book Band Pen Case version should you choose?

Fabric for a soft look, clear PVC for capacity, mesh for small tools, leather for two or three good pens.

Version	Material	Size	Capacity	Japan price
Black A and colors	Cotton and polyester	183 × 55 × 20 mm	Up to 4 thick pens	¥1,848 (about US$12)
Clear A	Non-phthalate PVC	183 × 50 × 35 mm	Up to 7 pens	¥1,518 (about US$9.60)
Mesh	Nylon	180 × 95 × 19 mm	Small items	Not checked
Recycled leather	Recycled leather, brushed lining	189 × 56 × 34 mm	2–3 pens	Not checked

Amazon US also lists the fabric case in khaki (41822006), navy (41823006) and beige (41824006).

How does it compare with other ways to carry pens on a notebook?

It carries more than a pen loop but adds more bulk. A Leuchtturm1917 pen loop holds one pen; the Book Band Pen Case holds up to four and keeps them zipped in.

If you’d rather keep pens separate from the notebook, a book-style case such as the LIHIT LAB Teffa holds far more. Our best pencil cases roundup covers other shapes.

Where is the Midori Book Band Pen Case made?

Midori doesn’t say on its Japanese store pages, and Amazon US doesn’t either. The brand belongs to Designphil Inc., based in Tokyo.

Check the sewn-in tag or the package if the country matters to you.

Frequently asked questions

What size notebooks does the Midori Book Band Pen Case fit?

B6 to A5, Midori says, because the elastic band has a length adjuster. That covers notebooks such as the Hobonichi Cousin and the Midori MD A5.

How many pens fit in the Midori Book Band Pen Case?

Up to 4 thick pens in the fabric version and up to 7 pens in the clear PVC version, per Midori.

Is the Book Band Pen Case washable?

Midori's notes for the fabric version say it can't be washed. Wipe it clean instead.

Can pens stain the fabric Book Band Pen Case?

Midori warns that some pen grip materials can transfer color to the fabric if they rub hard, so watch out with dyed rubber grips.

Does it fit a Traveler's Notebook?

Midori sells it for B6 to A5. A TRAVELER'S notebook Regular is 220 mm tall but only 120 mm wide, so it's outside the range Midori names; test the band before relying on it.

Is the Midori Book Band Pen Case made in Japan?

Midori doesn't say on its store pages, and Amazon US doesn't either. Midori is a Japanese brand of Designphil in Tokyo.

Sources (6)

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