Living Dex Card Binder Sizes: How Many Pages for 1,025 Pokémon

In the video games, a living dex means one of every Pokémon. In the card hobby the same idea becomes a binder with one card per species. Before you buy supplies, it helps to know how much room that takes. This guide does the math for the common page layouts and shows how to split the project across binders.

The starting number is 1,025, the count of Pokémon species through Generation 9. Every calculation below uses that figure, with one card per Pokémon and no spare slots. Add room for growth if you expect new Pokémon to be added.

The page layouts#

Trading card binder pages come in a few standard layouts:

• 4-pocket pages (2 by 2): small, portable binders that hold standard cards four to a side. Fine for a trade binder, not practical for 1,025 cards.
• 9-pocket pages (3 by 3): the standard. Most binders and most collectors use these.
• 12-pocket pages (4 by 3): more cards per page, with slightly tighter pockets. Good for compact storage.
• "18-pocket" pages: usually a 9-pocket page with both sides counted, as explained below.

Check how a product counts its pockets. Some listings give the number of pockets per page, others give the number per sheet counting both sides, and the same binder can be described two ways. A page with 9 pockets on each side holds 18 cards per sheet.

The math for 9-pocket pages#

Take 1,025 and divide by 9:

1,025 / 9 = 113.89

You cannot buy a fraction of a page, so round up. You need 114 pockets-worth of pages, meaning 114 sides of 9 pockets. The last page will have 8 of its 9 pockets filled (113 full pages hold 1,017 cards, leaving 8).

Now the question is whether you count sides or sheets:

• If you use both sides of each sheet, 114 sides is 57 sheets.
• If you use only one side per sheet (some people leave the back empty so cards do not touch or to make the binder easier to browse), you need 114 sheets.

Binder capacity is usually quoted as a card count. A binder that holds 360 cards in 9-pocket pages is 20 sheets with both sides used (20 x 2 x 9 = 360). Capacities vary by brand, so check the product page.

The math for 12-pocket pages#

1,025 / 12 = 85.42, which rounds up to 86 sides, or 43 sheets if both sides are used. The last side would have 5 filled pockets, since 85 full sides hold 1,020 cards.

Twelve pockets shrinks the project by about a quarter compared with nine, which is handy if shelf space or weight matters. The tradeoff is smaller margins around each card and busier-looking pages.

The math for 4-pocket pages#

1,025 / 4 = 256.25, so 257 sides, or about 129 sheets if both sides are used. This is rarely worth it. It does show why collectors rarely use 4-pocket binders for the full dex.

Quick reference#

How many binders is that?#

It depends on binder capacity. Using an example of a 360-card 9-pocket binder, 1,025 / 360 = 2.85, so three binders. A 720-card binder would take two, and a smaller 252-card binder (a common size for lower-cost binders) would need five, since 1,025 / 252 = 4.07. Always divide your target by the stated capacity and round up.

Capacity ratings are the number the manufacturer says the rings can hold comfortably. Filling to the limit stresses the rings and warps cards near the spine, so many collectors leave some room.

Splitting the dex by generation#

A single binder for everything is rarely practical, so most collectors split the dex. The cleanest way is by generation, because each generation has a defined range:

The sum is 117 sides, three more than the 114 you need if you pack every pocket continuously. That is the cost of starting each generation on a new page. Most collectors accept it, because the page breaks make the binder easier to read and you can add Pokémon to a generation without shifting everything.

A few observations from the table. Generation 6 is the smallest at 72 Pokémon, which fits exactly eight 9-pocket sides. Generation 5 is the largest at 156. Generation 1 alone is 151, so a binder for the original Pokémon needs 17 sides, or about 9 sheets used on both sides.

Page layout choices that save regrets#

Leave slots for growth. If you pack Generation 9 right to the last pocket, a new Pokémon means shifting. Ending each generation with a few blank pockets costs a page here and there but avoids reshuffling.

Decide how to treat forms. If you keep one card per dex number, the totals above hold. If you add regional forms or other variants, add pages for them, ideally in a separate binder.

Use dividers or labels. Printed page labels with the dex number range (for example, 001 to 009) make it quick to find a Pokémon. Many collectors slide a small label or a card-sized placeholder into the first pocket.

Row-by-row order. Fill each page left to right, top to bottom, the way you read. Consistency matters more than which direction you choose.

Use placeholders. An empty pocket looks like a mistake. A common trick is to put a printed slip with the Pokémon's name and number in unfilled slots. You can see the gaps, and each page looks complete.

Which size should you pick?#

For most people, the 9-pocket page is the right default. It is the format with the widest choice of binders, matches the way cards are usually displayed and is easy to find replacement pages for. Choose 12-pocket pages if you are short on space and do not mind a tight look. Avoid 4-pocket pages for the main dex.

For a first build, a sensible setup is one 9-pocket binder per two or three generations, or one per generation if you like a clean shelf. Count the sides you need, add a small buffer and buy one binder more than the math says. That is cheaper than running out in the middle of Generation 5.

Planning on screen first#

Before you buy, it can help to lay the project out virtually. A grid of all 1,025 slots shows the page structure and where your gaps are. DexBindr does this, and its example binder is a quick way to see how a species-by-species layout feels. A spreadsheet with a column for page number works too: take each dex number, divide by pockets per page and round up.

Summary#

For 1,025 Pokémon, one card each, you need 114 sides of 9-pocket pages (57 sheets used both sides), or 86 sides of 12-pocket pages (43 sheets). If you start each generation on a fresh page, the 9-pocket total is 117 sides. Check each binder's actual capacity, leave some growth room, and split by generation. With the math done, all that is left is filling the pockets.