Deck Box Dimensions: The Complete Size Guide by Game
Quick answer: a standard TCG card measures 63 × 88 mm. A deck box therefore needs at least 65 mm of internal width and 90 mm of internal height. For depth, count roughly 30 mm for 60 double sleeved cards, 50 mm for 100 cards, 60 mm for 125.
It is the question players ask most before buying, and the one product pages answer worst. "Holds 100 cards" means nothing until you know whether those 100 cards are bare, single sleeved or double sleeved. Here are the numbers that actually matter.
The Standard Card: Where Everything Starts
Magic, Pokémon, Lorcana, One Piece, Yu-Gi-Oh!: they all share the same card size, 63 × 88 mm. That is what lets a single deck box serve a Commander player on Saturday and a Pokémon league kid on Wednesday.
Thickness sits around 0.3 mm per bare card. Across a full deck, that tenth of a millimetre decides everything.
Sleeves: The Factor That Overflows Boxes
A standard sleeve adds thickness on both faces. A snug inner sleeve adds more still. As orders of magnitude, and depending on the brand:
| Protection | Per card | 100 cards |
|---|---|---|
| Bare card | ~0.3 mm | ~30 mm |
| Single sleeved | ~0.4 mm | ~40 mm |
| Double sleeved | ~0.5 mm | ~50 mm |
Those figures shift between ranges. What matters is the gap: between a bare Commander deck and the same deck double sleeved, you lose more than 15 mm of depth. That is exactly where boxes advertised as "100 card" give up.
Real Stack Heights, Format by Format
| Deck | Cards | Single sleeved | Double sleeved |
|---|---|---|---|
| Magic Standard | 60 + side | ~30 mm | ~38 mm |
| Lorcana | 60 | ~24 mm | ~30 mm |
| Pokémon league | 60 | ~24 mm | ~30 mm |
| Yu-Gi-Oh! (main + extra + side) | 70 to 90 | ~32 mm | ~42 mm |
| Commander | 100 + tokens | ~42 mm | ~52 mm |
| Target maximum capacity | 125 | ~50 mm | ~62 mm |
Always add headroom. Tokens, a commander card kept up front, a few spare sleeves and a life counter die rarely take less than 5 mm.
The Internal Volume to Aim For: 76 × 68 × 98 mm
The DeckSmith deck box has an internal volume of 76 × 68 × 98 mm, a direct translation of the constraints above. The 68 mm of width let the card's 63 mm breathe without rattling, the 98 mm of height take its 88 mm plus the grip you need to pull it out, and the 76 mm of depth absorb up to 125 double sleeved cards, tokens included.
It is also why we offer no size variants: one universal capacity covers Commander, Standard, Pokémon league and Lorcana. We break that decision down in our article on the 125 card capacity. Sleeve compatibility follows the same logic: Ultra Pro, Dragon Shield, KMC, Gamegenic and most standard sleeves fit, double sleeving included.
Will a Deck Box Fit in My Bag?
This one is measured differently. Forget your bag's total volume and look at the pocket you actually use: the front pocket of a backpack, the side compartment of a tournament bag, the slot beside a rolled playmat.
Three habits pay off:
- Measure the pocket, not the bag. A deck box that only goes in with a shove is a deck box you stop putting away.
- Allow around ten millimetres of play around the outer dimensions, so you can grab it and stow it one handed between rounds.
- Check the closure. A box squeezed between a binder and a water bottle has to stay shut. Our snap fit closure uses no magnets at all, so nothing weakens over time and nothing springs open at the bottom of a bag.
If you carry several decks, the other approach is to keep one base and change its face depending on the deck of the day. That is the idea behind the modular Proteus, which holds the same 125 double sleeved cards.
FAQ: Deck Box Dimensions
What are the dimensions of a standard TCG card?
A Magic, Pokémon, Lorcana, One Piece or Yu-Gi-Oh! card measures 63 × 88 mm and is roughly 0.3 mm thick. It is the reference format for every deck box on the market, and the reason one box can serve several games.
What dimensions do you need for a 100 card Commander deck box?
A 100 card Commander deck, double sleeved, forms a stack of roughly 45 to 55 mm. Aim for at least 60 mm of internal depth, plus 65 mm of width and 90 mm of height, with headroom for tokens and a commander card up front.
How much space do 125 double sleeved cards take?
Expect a stack of 55 to 65 mm depending on the sleeves. The DeckSmith internal volume, 76 × 68 × 98 mm, swallows that stack without any pressure on the lid, tokens and dice included.
Does double sleeving really change the size of a deck?
Yes, and it is the most underestimated factor. A bare card is about 0.3 mm, single sleeved about 0.4 mm, double sleeved about 0.5 mm. Across 100 cards the gap between bare and double sleeved exceeds 15 mm, more than enough to overflow a box advertised for 100 cards.
How do I know if a deck box will fit in my bag?
Measure the pocket you actually use, not the whole bag, and allow around ten millimetres around the box's outer dimensions so you can pull it out and put it back one handed. A rigid box with a snap fit lid survives the pressure of a packed bag without popping open.
Forge a Box With the Right Dimensions
Dimensions settled, the fun part is left: theme, colours, raised details. Our deck boxes are 3D printed in premium PLA and hand finished in our workshop in France, from 27 €.
- Build yours in the Forge, with live preview.
- Explore the custom deck box and its Inksmith and Ironsmith finishes.
- A deck box sized for Commander, tokens included.
- Read what players say about the format.