Slim or deeper briefcase: compare L and AA by your load's thickness
Some days call for a neat, slim briefcase; others bring chargers and extra papers. Even for the same job, the depth you need can vary.
Start with L for mainly slim documents, or AA for bulkier belongings too. AA has differing published measurements, which we explain below so you can check the dimensions you need.
Read listed depth and weight without confusing them
L measures 34×5×26cm externally and weighs 1kg. AA's description gives 35cm wide × 11cm deep × 26cm high, while its size image gives 35cm wide × 10cm deep × 27cm high. If you know what you want to put in AA, ask before ordering with those measurements.
AA weighs about 1.5 kg. Although it offers potentially more depth, the empty bag is heavier before adding belongings. Whether you carry thick items daily or only occasionally changes the decision.
COWMONO JOURNAL
Listed depth and differences to clarify
To see the candidate specifications first, start with Briefcase / Business Bag L dimensions and interior, Briefcase / Business Bag AA dimensions and interior.
Check fit using combined stacked thickness
Lay out your laptop case, charger pouch and folders and decide what will overlap. Gusset depth is an external measurement, not entirely usable internal space.
AA lists laptop storage and zipped pockets. Dividers can be useful but may limit where bulky items fit, so inspect opening and main-compartment photos before confirming.
Check two options against your requirements
| What to check | Briefcase / Business Bag L | Briefcase / Business Bag AA |
|---|---|---|
| Listed external dimensions | 34 × 5 × 26 cm (as listed) | Description: W35 × D11 × H26 cm; size image: W35 × D10 × H27 cm. Confirm the discrepancy. |
| Listed weight | 1 kg | Approximately 1.5 kg |
| Material | Genuine cowhide (crazy horse leather) | Cowhide (crazy horse leather) |
| Storage, accessories and other details | Slim shape; check internal dimensions and usable opening | Laptop storage and assorted pockets; removable shoulder belt |
| Listed price (including tax) | JPY 21,000 | JPY 28,000 |
Considering Briefcase / Business Bag L

Crazy Horse Leather Briefcase / Business Bag L
L has an external depth of 5cm. It is a briefcase for keeping belongings simple and enjoying a slim silhouette. Lay out your usual tools to see whether the charger can sit without pressing on the laptop.
View Briefcase / Business Bag L dimensions, storage photos and current availability
Considering Briefcase / Business Bag AA

Crazy Horse Leather Briefcase / Business Bag AA
AA includes a detachable shoulder belt, allowing hand or shoulder carry according to walking distance. The description and size image give different measurements; ask about the height and depth you need before ordering.
View Briefcase / Business Bag AA dimensions, storage photos and current availability
Assess suitability and ask before buying
Choose L when you can keep your essentials slim, or consider AA when thicker items need a place. Check your laptop's actual dimensions with its protective case and choose the one that makes morning packing feel straightforward.
COWMONO JOURNAL
Measuring stacked papers and cases
- Measure your usual load thickness
- Clarify AA's dimension discrepancy
- Add bag and contents weights
Shopping with cowmono
Shipping within Japan is free. For returns because the look or size is not right, return shipping is free when you contact us within seven days of delivery (conditions apply). Delivery information · Returns.


