MATOKA COTOMO Pocket Cover: 142 × 187 mm, Slider Pocket

Four MATOKA COTOMO Pocket Covers drawn to scale at 142 × 187 mm in navy, tan, mint and pink, with all eight colors shown as dots — Four of the eight colors at 142 × 187 mm (1 mm = 1.4 px); the slider and pocket are drawn by eye. Original illustration made for this guide. © Stationery Times.

Product facts

Product

MATOKA COTOMO Pocket Cover (CTM-021 to CTM-028)

Brand

MATOKA

Brand origin

Japan

Made in

Japan^*

Material

PVC

Price range

$$$5–20 per case

Colors

Whale (CTM-021)Navy

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Notes on these facts

Made by EL COMMUN. Made in Japan: EL COMMUN's product page gives Japan as the country of origin (the Japanese page's origin field). Source. Price: example listing.
Colors: names per EL COMMUN online shop (Japanese): COTOMO Pocket Cover, the design circles in the product photos, checked November 4, 2026. The shop names the eight colors after the animal design on each cover and gives no color names. The tints are sampled by eye from the design circles in the maker's first product photo and are representative. Tints are representative, not measured. Shops stock different colors.
How we test and disclose samples: How we test stationery.
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

The maker lists the cover at 14.2 × 18.7 cm and 0.6 cm thick (142 × 187 × 6 mm), made of PVC and made in Japan.
It holds one COTOMO notebook, which the maker sells separately, and has a slider pocket, one card pocket and one pen holder.
EL COMMUN's shop lists eight colors, codes CTM-021 to CTM-028, each named for a small animal design.
The maker's price is ¥1,100 (about US$7.00) including tax, in our $$ band ($5–20).
The maker warns that PVC can smell when new and suggests airing it in a well-ventilated place until the smell fades.

What is the MATOKA COTOMO Pocket Cover?

It is a thin PVC cover for one small notebook, with a slider pocket on the front for the bits that usually fall out of a bag. EL COMMUN, a Japanese stationery company, sells it under its MATOKA brand as part of the COTOMO series, which the maker describes as stationery that is easy to carry. The shop calls it the “cover with pocket”.

The maker says the pocket takes small things such as stickers and scissors, and that the cover is thin enough to carry easily while keeping the notebook from creasing and getting dirty. We read EL COMMUN’s online shop on November 4, 2026.

What are the size and features?

It measures 142 × 187 mm and 6 mm thick, and has three storage spots. These figures are from the maker’s spec list.

Spec	EL COMMUN says
Size	14.2 × 18.7 × 0.6 cm (142 × 187 × 6 mm; 5.6 × 7.4 × 0.2 in)
Material	PVC
Pocket	Slider-closing pocket
Other storage	One card pocket, one pen holder
Holds	One COTOMO notebook (sold separately)
Colors	8, codes CTM-021 to CTM-028
Made in	Japan
Price	¥1,100 (about US$7.00) including tax

The maker doesn’t give a weight or say how many cards the card pocket holds. For the line-up of other COTOMO products, see the COTOMO series.

Which notebooks fit inside?

The maker says one COTOMO notebook, and the sizes agree. The COTOMO Notebook is 125 × 180 mm, so the cover is 17 mm wider and 7 mm taller than the book it carries. The maker’s COTOMO Log Notebook has the same 125 × 180 mm size.

The 142 × 187 mm Pocket Cover with a dashed outline of the 125 × 180 mm COTOMO notebook inside it — The 125 × 180 mm notebook outlined inside the 142 × 187 mm cover (1 mm = 2.2 px); its position is drawn by eye. Original illustration made for this guide. © Stationery Times.

The maker doesn’t say whether other B6 notebooks fit. Its two-notebook Twin Cover is described for B6-size notebooks, but the Pocket Cover page names only the COTOMO notebook. Our notebook sizes chart lists B6 sizes from other makers, which differ by a few millimeters, so measure before you assume.

What colors does it come in?

Eight, named for the small animal on each cover. The shop lists Whale, Hedgehog, Chameleon, Shimaenaga (a long-tailed tit), Pom-dog, Dinosaur, Cat and Astronaut. In EL COMMUN’s photos the covers run from navy and tan to mint, pink, beige and near-black. The shop gives no color names, so the tints in the colors list are our reading of its photos.

How does it compare with the rest of the COTOMO series?

It is the cheapest cover in the line, and the one the maker describes with a slider pocket. The maker’s series page lists these prices, all including tax, with the converted dollars at our rates.

Product	What it does	Maker’s price
Pocket Cover	Holds one notebook, with a slider pocket	¥1,100 (about US$7.00)
Twin Cover	Holds two B6-size notebooks or planners	¥2,090 (about US$13)
Multi Pouch	Keeps a notebook and cards together, with a card holder	¥1,650 (about US$10)
Notebook	64 pages in three rulings	¥418 (about US$2.65)

The same company also makes the Deco Loop roller stamps that use some of the same animal drawings.

Who is the Pocket Cover for?

It suits people who carry one small notebook and want a few stickers, cards or a pen kept with it. The maker built it around three storage spots and a thin PVC body.

Skip it if you want a cover for two notebooks (the Twin Cover is the maker’s answer) or one for an unstated size: the maker’s page names only the COTOMO notebook.

Where is it made, and what does it cost?

In Japan, and ¥1,100 (about US$7.00) including tax, in our $$ band ($5–20). The maker’s series page lists ¥1,000 (about US$6.35) before tax and ¥1,100 (about US$7.00) with it. We did not find a US retailer price for the cover, so the dollar figure is a conversion of the Japanese price, and overseas prices will include shipping and tax. For other Japan-made options, see our guide to Japanese notebooks.

Frequently asked questions

How big is the MATOKA COTOMO Pocket Cover?

The maker lists 14.2 cm wide, 18.7 cm tall and 0.6 cm thick (142 × 187 × 6 mm, about 5.6 × 7.4 × 0.2 in). That is 17 mm wider and 7 mm taller than the 125 × 180 mm COTOMO notebook it is made for.

What does the pocket hold?

The maker says the slider-closing pocket takes small stationery such as stickers and scissors. The cover also has one card pocket and one pen holder.

How many notebooks fit inside?

One. The maker says the cover holds one COTOMO notebook, which is sold separately. The two-notebook cover in the same series is the COTOMO Twin Cover.

What is the cover made of?

PVC, per the maker's spec list. The maker adds that PVC can smell when new and says airing the cover in a well-ventilated place makes the smell fade.

Does it protect the notebook?

The maker says the thin cover keeps the notebook from creasing and getting dirty. It gives no waterproofing or durability claim, and we have not tested it.

Which colors are there?

Eight, each named for an animal: Whale, Hedgehog, Chameleon, Shimaenaga, Pom-dog, Dinosaur, Cat and Astronaut. In EL COMMUN's photos they run from navy and tan to mint, pink and beige.

Is the Pocket Cover made in Japan?

Yes. EL COMMUN's product page gives Japan as the country of origin. EL COMMUN is a Japanese company and MATOKA is one of its brands.

Sources (3)

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