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Rigid Boulder 100+ deck box — solid grey
Holds 100 double-sleeved or 120 single-sleeved cards
Colour-matched to the Ultimate Guard Monocolor line
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Clean, monochrome and rock solid. The Boulder 100+ Solid in grey is a rigid deck case built for 100 double-sleeved cards, colour-matched to the Ultimate Guard Monocolor line so it looks the part next to the rest of your kit.
At a glance
Holds 100 double-sleeved or 120 single-sleeved standard-size cards
Solid grey finish to match the Ultimate Guard Monocolor line
Durable, rigid box with a secure closure
Modular design combines with the wider Ultimate Guard range
Box size approx. 76 × 75 × 98.5 mm; made in Germany
Why it's good
Fully opaque shell keeps your deck hidden and protected
Slots neatly into the Arkhive storage system
Simple, sturdy and smart — the deck box that just works.
Rock-solid protection with a clean, premium finish. Pair it with a fresh pack of Ultimate Guard sleeves to keep those cards double-sleeved and safe.
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Hand over the choice instead. A Loaded Dice eGift Card arrives by email in seconds and spends on anything we stock — so they can grab this the moment it's back, or pick something else entirely.
How many cards does it hold — and does that count sleeves?
Capacity figures on deck boxes are for sleeved cards, so a box rated 100+ holds a 100-card deck in standard sleeves, with the plus giving headroom for a few tokens or extras. If you double-sleeve, treat the rated number as optimistic and size up.
Will a Commander deck fit?
A 100+ box takes a Commander deck in single sleeves with a bit of room for the commander and a handful of tokens. Double-sleeving, or carrying a full token and dice setup, wants a 133+ or larger — the extra couple of pounds saves the daily annoyance of a lid that won't quite shut.
Is it worth paying more for a premium deck box?
For a deck you carry around, usually. The differences that actually matter are a lid that stays shut in a bag, a shell rigid enough to survive being sat on, and a lining that won't scuff your sleeves. A cheap box is perfectly fine sitting on a shelf — it's transport that finds its limits.
Can I store a deck in here long term?
Yes, as long as the cards are sleeved and the box lives somewhere dry and out of direct sunlight — light and humidity do far more damage than any box. If you're storing a collection rather than a deck, a portfolio is easier to browse and kinder to the cards.
