Portal guides · Binders
A binder is the one piece of kit almost every collector buys, and the one almost everyone buys twice. The first one is whatever was on the shelf. The second one is the one that actually suits the collection, bought after a card slid out of a top loading pocket or a ring left a dent in a holo.
This guide is the second binder, first time. It walks the six decisions that a binder choice really turns on, in the order that matters, and tells you where we stand on each. Where a claim is folklore rather than fact, it says so.
Every spec quoted here is from the binders we build on and sell, and every card count is from our own set checklists, not copied from another blog.
Skip the reading? See every Portal binder, plain, printed and premium
Last checked: 5 September 2026. Binder specs and prices are taken from the Portal listings and the COVRD spec sheet. Card counts come from our own set checklists. Recheck when the binder range or prices change.
The short answer
- Pocket count is a layout decision, not a quality one. 9 pocket runs three cards across and matches how a set is numbered. 12 pocket fits more per page in a wider binder.
- Side loading pockets and a zip closure are the two features that stop cards falling out and keep dust off. Both are worth paying for.
- Avoid ring binders for anything you care about. Bound pages, or D rings at a push. O rings press into the cards nearest the spine.
- Capacity: a 20 page 9 pocket binder holds 360 sleeved cards. That fits most master sets in one binder and the biggest ones in two.
- Plain, printed or premium is a display decision. The protection underneath is the same binder.
- Always sleeve the card inside the pocket. The pocket protects against dust and handling, the sleeve protects the card from the pocket.
What a binder is actually for
Two jobs, and the second one is why people buy them.
A binder does two things. It keeps cards flat, clean and in order, and it lets you look at them. That second job matters more than collectors admit. A collection you never see is just an asset in a box, and the binder is the difference between a hobby and a storage problem.
What a binder is not is deep storage for your most valuable cards. A card worth real money belongs in a sleeve and a semi rigid or a case, and only comes out for showing. Our protection and storage guide covers that ladder. This guide is about the binder itself, and the decisions that separate a good one from a shelf filler.
The six decisions, in order
- Pocket count: 9 or 12 per page.
- Loading: side loading or top loading pockets.
- Closure: zip, strap or elastic.
- Rings: bound pages, D rings or O rings.
- Materials: what the pages are made of.
- Capacity and look: how many cards, and plain, printed or premium.
9 pocket or 12 pocket?
The most asked question, and the least important one for protection.
A 9 pocket page holds cards three across and three down. A 12 pocket page runs four across, so the binder is wider and holds a third more per page. In a 20 page binder that is 360 cards against 480. Neither protects a card better than the other. The pockets are the same size and the pages are made of the same material.
Where it matters is reading order. Pokemon sets are numbered, and a 9 pocket page shows a set nine cards at a time in exactly the sequence our master set checklists and placeholder cards are laid out in. Open a Portal set binder at any page and the numbers run left to right, top to bottom, with no card out of place. That is why every binder we print is 9 pocket.
If you collect one Pokemon rather than a set, or you keep a trade binder that changes every week, the extra capacity of a 12 pocket can be worth the width. The full comparison, including what happens to a set's numbering on a four across page, is in 9 pocket versus 12 pocket binders.
Portal takeFor a set, 9 pocket. For a trade binder or a single Pokemon collection, either. Nobody has ever regretted 9 pocket for a master set, and plenty have regretted trying to make a set read in fours.
Side loading or top loading?
The feature people notice only after they have lost a card.
A top loading pocket opens at the top. Turn the binder on its side in a bag, or pick it up wrong, and gravity does the rest. A side loading pocket opens towards the spine, so a card has to travel sideways and then up to get out, which it never does on its own.
That is the whole argument. Side loading costs a fraction more to make, and it is the reason a binder can stand upright on a shelf, travel to a card show, and come back with every card still in its slot. All of our binders are side loading, and it is the first spec we would check on anyone else's.
There is a second, smaller benefit. Sliding a sleeved card in from the side puts less strain on the pocket edge than pushing it down from the top, so the pages stay tidy for longer. The detail is in side loading versus top loading pockets.
TipThe shelf test
A side loading binder can live upright on a shelf like a book with the zip closed. That is the best way to store one, because nothing sits on the pages. A top loading binder has to lie flat, and flat binders get stacked, and stacked binders press on the cards inside.
Zip, strap or elastic?
Three ways to hold a binder shut, and only one that seals it.
A strap is a fabric or elastic band that stretches across the front. It holds the binder closed and it is quick to open, but the page edges are exposed on three sides, so dust gets in and the pages can fan if the binder is dropped.
An elastic band closure does the same job with a thinner band. It is the cheapest option and the one most likely to stretch out over a year of use.
A full edge zip runs around three sides and closes the binder into a case. Dust and light stay out, the pages cannot fan, and the binder cannot open in a bag. It is the closure on every binder we print, because it is the only one that turns a binder into a sealed unit.
The trade off is speed. A zip takes a second longer to open than a strap, and if you are flicking through a trade binder every few minutes at a show that adds up. For a set that lives on a shelf and comes out for showing, the zip wins every time. More in zip, strap or elastic.
Commonly saidZip binders trap moisture and damage cards
We have not found any evidence for this, and it does not match how binders are used. A zip keeps a binder closed on a shelf. It is not airtight, so it neither traps damp nor seals it out. What damages cards is storing any binder somewhere humid, and the fix is the room, not the closure. Our storage guide covers where to keep a collection.
Rings: the one to avoid
The oldest binder design in the hobby, and the one that does the most damage.
A ring binder holds loose pages on two or three metal rings. The pages nearest the spine sit against the rings, and every time the binder is closed, shut in a bag or stacked, the rings press into the cards in the inside column. That is where the dents, the ring marks and the bent corners come from.
O rings are the worst, because the page rests on the curve of the ring. D rings are better, because the pages hang flat off the straight edge. Bound pages, stitched or welded into the spine with no rings at all, are best, because there is nothing for the cards to press against.
The one thing rings do well is let you add and remove pages, which is why trade binders and bulk storage still use them. For a set binder, where the page count is fixed and the cards are worth protecting, bound pages win. Every Portal binder has bound pages and no rings.
Portal takeIf you already own a ring binder, keep it for bulk and trades. Move anything you would mind losing into a bound page zip binder. That single move fixes most binder damage we see.
Pages and materials
Two words to look for, and one to avoid.
Binder pages are plastic, and the plastic matters because the card sits against it for years. Look for acid free and PVC free. PVC pages contain plasticisers that can migrate into a card's surface over time, and the older album pages that went cloudy and tacky were PVC. Modern polypropylene pages do not do this.
The cover matters less for the cards and more for the binder's life. A padded fabric cover shrugs off the knocks a binder takes in a bag, and it is what we print on. The binders we build on are acid free and PVC free throughout, and the full material argument, including why sleeves are still worth it inside a good pocket, is in our storage guide.
What to look for on the spec
- Acid free, PVC free pages. Non negotiable for anything kept long term.
- A padded cover. Rigid enough to protect, soft enough not to mark other binders on the shelf.
- Pocket size that takes a sleeved card. The binders we use have an internal pocket of 68 by 97 mm, which fits a sleeved card without forcing it.
How many cards do you actually need to fit?
A base set is small. A master set is not. Count before you buy.
A 20 page 9 pocket binder holds 360 sleeved cards, one per pocket. Whether a set fits depends on which set and how far you are taking it. The printed count on the card is the main set. Add the secret rares numbered above it and you have the set as it comes out of the packs. Add the reverse holos and you have the master set, which is the count our checklists and binders are built around.
From our own checklists: Pitch Black is 84 cards as printed, 120 with its secret rares, and 194 as a master set. That fits in one binder with room to spare. Ascended Heroes is 217 as printed, 295 with secrets, and 475 as a master set, which needs two binders however you arrange it. Most current sets sit between those two.
Every set we cover has all three counts on its set page, so you can check before you buy the binder. The full table is in how many cards are in a master set, and the definitions are in what is a master set.
Watch outNever over fill a binder
If a binder strains to close, it is already pressing on every card inside it. Split the set across two binders before that happens. Our standard and premium printed binders for a set are the same binder underneath, so a two binder master set can be one of each.
So which one should you buy?
Match the binder to the collection, not the other way round.
There is no single best Pokemon binder, because there is no single kind of collector. There is a best binder for the collection you are actually building.
Pick the line that sounds like you
- Just started, or buying for a child: a plain COVRD zip binder. All the protection, none of the commitment, and it grows into anything.
- Building a master set: the Standard Printed Binder for that set, with the checklist added. It is laid out for the set's numbering and it looks like the set on the shelf.
- Chasing one card: the Premium Printed Binder with that card on the cover. When you finally pull it, it goes in the binder that was waiting for it.
- Collecting one Pokemon across every set: a Character Binder, or a 12 pocket if the collection is large and the order does not matter.
- Trading every week: keep a ring binder for the churn and a zip binder for the keepers.
- Want your own design on it: join the custom binder waitlist. You will hear first when your artwork can go to print.
Portal takeBuy the second binder first. A side loading, bound page, PVC free zip binder is the whole checklist, and every Portal binder passes it. What you put on the cover is the fun part.
Questions people actually ask
Is a 9 pocket or 12 pocket binder better for Pokemon cards?
Neither protects a card better. A 9 pocket page holds three cards across and reads a numbered set in order, which is why set binders and checklists are built around it. A 12 pocket page holds four across, fits a third more per page and suits trade binders and single Pokemon collections. For a master set, 9 pocket.
Do zip binders damage Pokemon cards?
No. A full edge zip keeps dust and light out and stops the binder opening in a bag. It is not airtight, so it does not trap moisture either. Damage in binders comes from ring pressure, top loading pockets letting cards slide, over filling, and damp rooms, not from the zip.
Are side loading binders better?
Yes for anything you carry or store upright. A side loading pocket opens towards the spine, so a card cannot slide out when the binder is tipped. Top loading pockets open at the top and lose cards in bags. Every Portal binder is side loading.
Will a full master set fit in one binder?
A 20 page 9 pocket binder holds 360 sleeved cards. Most current master sets fit in one. The largest do not: Ascended Heroes is 475 cards as a master set and needs two binders, while Pitch Black is 194 and fits in one with room. Every Portal set page lists the main set, with secrets, and master set counts so you can check first.
Are ring binders bad for Pokemon cards?
O ring binders press into the cards nearest the spine every time the binder is closed or stacked, which causes ring marks and dents. D rings are better because the pages hang flat. Bound pages with no rings are best, and that is what Portal binders use. Keep ring binders for bulk and trades.
Do I need to sleeve cards inside a binder?
Yes, one sleeved card per pocket. The pocket protects the card from dust and handling. The sleeve protects the card from the pocket, and from the friction of sliding in and out. A penny sleeve inside a binder pocket is the cheapest meaningful upgrade in the hobby.
What size is a Portal binder?
Portal printed binders are built on the COVRD 9 pocket zip binder: 350 mm tall, 260 mm wide and 30 to 45 mm deep, with 20 double sided pages and an internal pocket of 68 by 97 mm. Capacity is 360 sleeved cards. Where COVRD is out of stock we build on Vault X or Mint Keeper binders of the same format.
Six decisions: pocket count, loading, closure, rings, materials, capacity. Get those right and the binder will outlast the collection it holds.
Then pick the cover. Plain if you want quiet, the set's art if you are building it, the chase card if you are hunting it, your own artwork when the custom line opens.
Collect better.
Where these numbers came from
- Portal TCG binder listings and the COVRD 9 pocket zip binder spec: capacity, page count, pocket size, dimensions, materials and prices, checked 5 September 2026
- Portal TCG set checklists: the Pitch Black and Ascended Heroes card counts, main set, with secrets and master set
- Portal TCG guide: How to protect and store your collection: the PVC and ring binder findings this guide relies on
The binder guides
Built to the checklist above
Pokemon binders
9 pocket, side loading, bound pages, full edge zip, acid free and PVC free. Plain from £24.99, printed to order from £49.99.
Shop Pokemon bindersStart the set in one go
Master Set Bundles
The set binder and its checklist together, with a Collector's Bundle option that adds sealed packs.
See master set bundlesYour artwork, our print
Custom Pokemon binders
Personalised binders printed with your own design are next. Join the waitlist and hear first.
Join the waitlist