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Discover the ULTBIAS difference
Sold out with every restock, the myUNIVERSE Part II collection was first introduced in 2025 and tenderly builds upon the story that began with the original. The iconic photocard window remains, now crowned with celestial hand-illustrations that feel like a world quietly blooming into view: a next chapter, and a quiet expansion of the world ARMY had come to cherish.
About Duo Edition - A4 myCOLLECTION Binders
The Duo Edition is a 2-in-1 binder system for collectors who want maximum storage space without compromising on utility, protection or design. An ULTBIAS original solution, it comes with two individual custom A4 ring binders stored togeter in one shared outer case. In development for almost two years, the innovative design improves the overall management of larger collections by making it easier to access, organize and browse.
The Duo Edition is one of three sizes available in our Custom A4 myCOLLECTION Binder range. It offers the most photocard storage and can fit a total of x90 single-sided sheets of our Custom A4 9-Pocket Photocard Pages, which holds up to 810 photocards across both binders.
Each custom A4 4-D ring binder included is constructed with tough premium board core and equipped with a dual magnet clasp. This enclosure keeps the contents safe and gives the binder its signature box-like structure to ensure it can be stored standing without collapsing. The protective Binder Shield™ prevents pages from sagging when stored upright, supported by custom-engineered reinforced rings that can withstand up to 2kg of weight. Designed for everyday handling, the spine eyelet together with the ventilated holes on the outer case makes it effortless to quickly access and shelf your binder in one quick wobble-free motion.
With no fixed pages, tailor your binder to fit the exact needs of your collection with the flexibility to adapt and change your set up at any time. For the best fit and alignment, choose our archival-safe Custom A4 Pocket Pages.
Care Note
To preserve our myCOLLECTION binders, store away from direct sunlight in a cool, dark space.
Due to the large size of our binders, an order limit has been enforced to ensure your binder(s) arrive safely:
These limits apply to the binders only and pocket pages can still be added to your order.
SEE IT IN ACTION
Find the right binder for your collection. Discover the difference between our two signature sizes: Single and Duo Edition.
Shop Single
Single
Fits up to x45 single-sided sheets of our Custom A4 9-Pocket Photocard Pages, which can hold up to 405 kpop photocards in total.
Duo Edition
An ULTBIAS original 2-in-1 binder system. It comes with two Single A4 binders stored together in one shared outer case.
Fits up to x90 single-sided sheets of our Custom A4 9-Pocket Photocard Pages, which can hold up to 810 kpop photocards in total.
Single
Best-Selling Size
Duo Edition
2-in-1 Binder Set
Up to 405 photocards
Photocard Storage
Up to 810 photocards
Up to 45 sheets
Page Capacity
Up to 90 sheets
300 x 350 x 64mm
Binder Dimensions
300 x 350 x 64mm
300 x 350 x 64mm
Outer Case
305 x 360 x 140mm
SHOP 40% OFF
![[PRE-ORDER] Custom A4 2-Pocket Pages - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-2-pocket-pages-604486.jpg?v=1772516497&width=1500)
![[PRE-ORDER] Custom A4 3-Pocket Pages - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-3-pocket-pages-378491.jpg?v=1772516579&width=3855)
![[PRE-ORDER] Custom A4 4-Pocket Pages - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-4-pocket-pages-936954.jpg?v=1772516650&width=1500)
![[PRE-ORDER] Custom A4 6 Pocket Pages - H - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-6-pocket-pages-h-614149.jpg?v=1772517531&width=1500)
![[PRE-ORDER] Custom A4 6 Pocket Pages - V - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-6-pocket-pages-v-836193.jpg?v=1772516756&width=1500)
![[PRE-ORDER] Custom A4 8-Pocket Pages - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-8-pocket-pages-388965.jpg?v=1772517512&width=1500)
![[PRE-ORDER] Custom A4 9-Pocket Pages – V1 – K-Pop Slim Fit - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-9-pocket-pages-v1-k-pop-slim-fit-709931.jpg?v=1772516948&width=1500)
![[PRE-ORDER] Custom A4 9-Pocket Pages – V2 – K-Pop Slim Fit + Note - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-9-pocket-pages-v2-k-pop-slim-fit-note-973990.jpg?v=1705481402&width=3218)
![[PRE-ORDER] Custom A4 9-Pocket Pages – V2 – K-Pop Slim Fit + Note - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-9-pocket-pages-v2-k-pop-slim-fit-note-123325.jpg?v=1705481402&width=1500)
![[PRE-ORDER] Custom A4 9-Pocket Pages – V3 – K-Pop Double-Sleeve - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-9-pocket-pages-v3-k-pop-double-sleeve-396386.jpg?v=1772516972&width=1500)
![[PRE-ORDER] Custom A4 9-Pocket Pages – V4 – Standard Fit - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-9-pocket-pages-v4-standard-fit-804750.jpg?v=1772517488&width=1500)
![[PRE-ORDER] Custom A4 10-Pocket Pages - Prism Platinum](http://ultbias.com/cdn/shop/products/pre-order-custom-a4-10-pocket-pages-416898.jpg?v=1772517107&width=1500)
ONLY WHILE STOCKS LAST
Overall rating: 5.0 / 5 from 22 reviews.
![Customer photo review of [PRE-SALE] A4 myUNIVERSE Binder - Part II - Duo Edition](http://images.loox.io/uploads/2026/10/24/KwKQgpMkq_mid.jpg)
This is my first ever high quality Binder that I ordered especially for my BTS Arirang collection and I love it so much 💜 the design is absolutely beautiful and with so many details, carefully packed and just perfect. I can’t wait to sort all my photocards into this binder. Thank you so much for creating this masterpiece! 💜
An absolute highlight of my BTS collection! 💜 I preordered this ARMY binder and was so excited for it to arrive, but unboxing it exceeded my expectations! Everything was packed so carefully and protected so well for shipping. And the gorgeous special packaging… I was honestly speechless with happiness! 🥹💜 The unboxing itself felt like a little event. I can’t wait to start organizing my photocards in it—or at least part of my collection! 😂 Thank you so much for this beautiful product and all the care put into the packaging. Absolutely worth the wait! 💜
(World) [PRE-ORDER] A4 myUNIVERSE Binder - Part II - Duo Edition
im in love with this binders!!
So glad I got my hands on this binder duo! Absolutely obsessed with the colour and details and they can fit a decent amount of pages!
THE PRETTIEST BINDER! The pockets do get caught in the rings a lot though..
Duo Edition – Tarot Series - The Bias + Bias Wrecker Version 1
My favourite binders, the clasp does catch a lot though...
Duo Edition – Tarot Series - The Bias + Bias Wrecker Version 2
The perfect place to store all my BTS goodies! Thanks, Ultbias 🙏💜
Right next to its lighter version, these were my first binders that made me decide to move over to A4s for my BTS inclusions. These are amazing quality, Ultbias! Thanks! 🎉🥳🎉🥳🎉🥳🎉
Duo Edition – Tarot Series - The Bias + Bias Wrecker Version 2
So glad to have received my My Universe A4 binder duo. I already completed them with my BTS collection. They are so beautiful !
Love how beautiful it is. Lovely colors! Loving the A4 size! Please do more if this size. Great for Armys 💜💜💜
Love this new addition to my growing A4 binder/myUniverse collection! I really like that the A4 myUniverse binders also come with a photocard display window, like the prior A5 myUniverse binders, but unlike other A4 duo editions this version does not have an interchangable design on the spine :(
This binder is the ultimate for Army... It's not only beautiful but also really functional. I know you can get cheaper products, but the quality, the inclusions and the how it's absolutely personalised for BTS sold me. Thanks Cathy and the team for making great products for the fans!
Les produits sont vraiment très beaux, très bien faits. La qualité est excellente
Bias + Bias Wrecker - Serenity Duo Edition - A4 myCOLLECTION Binder
These binders are such great quality - I wasn't sure what to expect when I ordered but they are incredible. They look so stunning, the light blue is gorgeous and I'm obsessed. Definitely recommended!
Duo Edition – Tarot Series - The Bias + Bias Wrecker Version 1
Love the massive layout for my album pcs. Also love that it comes in a dust proof covering so I don't have to worry about the quality of my cards.
Duo Edition – Tarot Series - The Bias + Bias Wrecker Version 2
Not a collector but this binder is perfect for storing and organising my pobs from merch and album purchases all in one place. Great quality and aesthetic as well. ✨
Duo Edition – Tarot Series - The Bias + Bias Wrecker Version 2
These are my first Prism Platinum binders and I have to say, I’m highly impressed by the quality! From aesthetics of the actual binders to the packaging, it’s definitely worth investing in. It makes the process of collection all the more fun! :)
Duo Edition – Tarot Series - The Bias + Bias Wrecker Version 2
The quality of these binders is incredible! They’re sturdy and keep all the pages well-protected. Will definitely buy more as my pc collection gets bigger
Duo Edition – Tarot Series - The Bias + Bias Wrecker Version 1
The Tarot Series binder is the binder of dreams! It's sturdy, solid, the backboards are awesome and the binder shield is perfect to protect your sleeves and PCs when stored upright. I'm so glad I bought this on release day and I have the peace of mind that my binders are safe in this beautiful storage.
Duo Edition – Tarot Series - The Bias + Bias Wrecker Version 1
Th2 Duobinder is just very nice 🤍
Duo Edition – Tarot Series - The Bias + Bias Wrecker Version 2
Absolutely stunning and well presented. Very happy 😍
Bias + Bias Wrecker - Serenity Duo Edition - A4 myCOLLECTION Binder
Beautiful binders. Love the design. Sturdy. Well built.
Duo Edition – Tarot Series - The Bias + Bias Wrecker Version 2
