A horizontal deck box with extra room allocated to thick inner sleeves
I would choose the Sidekick XL for its low, horizontal presentation and documented larger compartment. The removable cover can attach underneath at the table. Its capacity is a manufacturer claim with a sleeve-brand caveat, rather than a universal guarantee for every 100-card stack.
Choose it if
You prefer cards stored horizontally and want the XL allowance for inner sleeves.
Look elsewhere if
You want a dedicated dice drawer or the narrow footprint of an upright box.
The buying facts
| Rated capacity | 100 double-sleeved cards with thick inners; Gamegenic recommends its own sleeves |
|---|---|
| Outer dimensions (W × D × H) | 104 × 96 × 78 mm |
| Inner compartment (W × D × H) | 95 × 78 × 69 mm |
| Layout | Horizontal card storage; removable cover |
| Closure | Magnets |
Will it fit?
Manufacturer-statedGamegenic rates it for 100 double-sleeved cards with particularly thick inners, recommends Gamegenic sleeves, and warns other brands can change capacity. Ordinary double-sleeved cards may leave token space; do not assume that allowance also applies with thicker inners.
Horizontal or upright?
Sidekick and Squire XL are close functional alternatives. I would choose between them by how the box sits in the bag and how I take cards out at the table. The orientation changes the footprint even when the intended deck capacity is similar.
The published inside dimensions are useful for comparison, but neither a dimension calculation nor an XL label proves that your exact stack will fit. Compare the assembled deck without forcing the closure.
When the drawer is worth it
If dice and counters travel in a separate pouch, the Sidekick avoids dedicating box space to an accessory tray. If they are always part of the same kit, the Watchtower provides a different layout worth considering.
The removable cover is a convenience feature. I would still keep the closed box supported inside a bag rather than infer that a magnetic closure establishes drop resistance.
What to compare it with
Gamegenic Squire 100+ XL Convertible
Choose the upright orientation if it suits your bag or table better.
Gamegenic Watchtower 100+ XL Convertible
Adds a separate accessory drawer for a more complete single-deck kit.
Sources & verification
- Gamegenic Sidekick 100+ XL Convertible — manufacturer specifications — Manufacturer documentation. Verified 2026-09-26.