A4 Shoulder Bag

Regular price €214,00


Handcrafted A4-size leather shoulder bag

Don't let the measures fool you. A4 is perfect compact mobile office or stash for your daily essentials. It can take most of the compact laptops (13” and less) and good size water bottles. Classic A4 size fits your essential papers even with a light folder.

Special Kasperi L-buckle makes the operation easy and deep extra pockets keep small things and modern smartphones organised.

Available also as a backpack. Perfect for kids too!.

Why this bag?


  • Timeless design that builds character over time as the leathers patinates.
  • Built to last to leave something for the next generations.
  • Engineered for repairability with strong materials that make repairs possible.
  • Perfect mobile office, that'll let you establish a productive day wherever you go.
  • Handcrafted in Finland with passion.


  • Sturdy 30 mm wide and 3 mm thick adjustable shoulder strap with D-ring attachment will make the bag comfortable to carry even fully loaded
  • Special stainless steel buckle is light and easy to use
  • Two deep front pockets to fit a computer the size of the 2018 or newer 13" Macbook Pro or Air (31 cm or less in width, 22 cm or less in height).

Materials and origins

  • Made from high quality Tärnsjö tannery’s vegetable-tanned leather from Sweden
  • Handcrafted in Finland

Inside dimensions

  • Width 22,5 cm
  • Height 31 cm
  • Depth 5 cm


Products are delivered worldwide via Posti, UPS, and Express Mail Service (EMS). Delivery options and shipping fees for your area are provided at the checkout. Delivery times vary between 3-21 days.

To see your options in more detail proceed to checkout.


Products are delivered via Matkahuolto to the nearest pickup point of the address provided. In Helsinki a bicycle courier option and pickup appointments are also available.

Tracking orders and Support

Customers are notified and sent a tracking number by e-mail to the address provided.

Contact us for tailored support or requests with the form below or via email.


How should I care for my leather bag?

You can start using your bag straight out of the box. Leather works well even in bad weather conditions, and getting wet is fine as long as it is properly cared for. Of course the harder use, the faster patina, but that only ads character to the bag.

Treat with wax every 4-6 months or when the leather feels like it's drying, treat lightly with wax. Wipe the leather to clean it. With a cloth spread a thin layer of wax on the leather. Allow the wax to permeate overnight and then polish the remainders off with a cotton or wool cloth. The scent of tar will fade away in a couple of days, if a lot of wax is applied, this will take longer.

We recommend using natural products like bees wax based products or natural oils. Synthetic leather protection can block the pores of the leather. This will reduce the leather's ability to absorb wax and oils - ultimately reducing the lifespan of the bag

How long is the break in period of the leather bag?

We believe that leather is the best material for bag because it conforms to our bodies over time and can last for decades while remaining in good condition.

Like all high quality leather goods, Kasperi bags also have a break-in period. It will take a couple of weeks of active use for the shoulder straps to start forming to your body. If you experience any pressure points, squeeze the straps lightly with your hands from the pressure points to help it form faster.

Closing and opening the buckles is also stiff at first but as the leather loops softens and form over time it will become fluid.

With proper care and use, these bags develop a unique patina and become more personal by the day.

What about repairs or service?

We believe in the “right to repair”. Every aspect from structures to material thicknesses are considered for repairability. Because our bags are designed to last for decades, it is inevitable that they will require servicing at some point. The hardest wearing parts like the shoulder straps are made from 3 mm leather so that they will last for decades of use.

The hardest wearing parts (i.e. shoulder straps) are made from 3 mm leather for longevity and the whole structure is designed with serviceability in mind.

We offer a repair service for our bags and backpacks.

Kasperi A4 Shoulder Bag
Kasperi A4 Shoulder Bag
Kasperi A4 Shoulder Bag
Kasperi A4 Shoulder Bag

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