While the items people carry with them every day vary, the "smartphone" is probably common to many.
For those who want to "go out empty-handed without a bag" or "make their luggage as compact as possible," using the size of a smartphone as a reference makes it easier to consider the size of items to carry.

In this blog post, we will introduce 5 leather accessories from Munekawa that are designed to be smaller than an iPhone 17 Pro, so they won't stick out when stacked with your smartphone.
In addition to their compact size, all of these items have a simple design with minimal embellishments, making them less bulky even when carried alongside your smartphone in your pocket. If you want to go out empty-handed, carrying only the essentials in your pocket, these items will help you achieve that lightness.
Comparing sizes by stacking with a smartphone
First, let's compare the dimensions of the iPhone 17 Pro and the 5 items.
| Item | Size (approx.) |
|---|---|
| iPhone 17 Pro | Height 150mm × Width 71.9mm × Thickness 8.75mm |
| Airtag Case "Tracker" | Length 100mm × Width 45mm |
| Bell-shaped Key Case S "Bell S" | Length 110mm × Width 52mm × Thickness 20mm |
| Mini Key Case "Pivot" | Length 73mm × Width 35mm |
| IC Card Case "Tuck" | Length 67mm × Width 97mm × Thickness 6mm |
| Mini Coin Case "Palm" | Length 57mm × Width 64mm × Thickness 6mm (lid part 11mm) |
All five items introduced here are sized so that they do not protrude beyond the length and width of the iPhone 17 Pro when stacked. Since they will fit in any pocket that holds a smartphone, please use this as a reference when choosing sizes before purchasing.
*All leather accessory sizes are approximate. iPhone 17 Pro dimensions are referenced from the official Apple website specifications.
Airtag Case "Tracker" | Loss prevention in a pocket-sized form
Tracker is a leather case designed to store Apple's AirTag. It's a popular item, especially among those who want to avoid the "gadgety feel" of an AirTag, as it comes in a key ring style that can be attached to keys or bags.

It measures approximately 10cm long x 4.5cm wide and weighs about 11g. Its compact size allows it to fit when stacked with a smartphone, so you can carry it compactly even with car keys or house keys attached.
In addition to an AirTag, the case can hold up to three 500-yen coins, making it a convenient alternative coin case for when you suddenly need cash.
Bell-shaped Key Case S "Bell S" | Encasing and protecting your keys
The Bell S is a bell-shaped key case where you pull a strap to fully store your keys inside its pouch-like body.
Its external dimensions are approximately 11cm long x 5.2cm wide x 2cm thick. Despite its plump shape with gussets, its stacked footprint is slightly smaller than an iPhone 17 Pro, so it doesn't take up much space in your pocket.

It can store about 3 to 5 keys, and you can choose between a ring and a hook type of metal fitting depending on your use. Since the keys are encased in leather, it's a reassuring point that they are less likely to scratch your smartphone or clothes in your pocket.
▶︎Click here for the Bell-shaped Key Case S "Bell S" product page
Mini Key Case "Pivot" | As close to key size as possible
For those who want to carry their keys even smaller, "Pivot" is recommended, which is even smaller than Bell S.
It measures approximately 7.3cm long x 3.5cm wide. This key case has been stripped of unnecessary parts to be as close to the size of a key as possible.

It can hold about 5 standard-sized keys (approx. 65x26mm) and reduces the jangling metallic sound of keys bumping together.
The metal fittings are made of brass, and the way they age along with the leather is a unique charm of this item.
IC Card Case "Tuck" | Cards organized with 3 pockets
This is a multi-card case measuring approximately 6.7cm long x 9.7cm wide x 6mm thick. It features three independent card pockets and can store about 5 to 7 credit card-sized cards.

The front pocket allows you to use your IC card without removing it, and the main pocket with a flap can be used as a coin purse for small change.
At approximately 6mm thick, it's thinner than the iPhone 17 Pro and fits neatly into pants pockets or even breast pockets. For those who primarily use cashless payments, there may be many days when just a smartphone and Tuck are all you need.
Mini Coin Case "Palm" | The smallest coin purse that fits in the palm of your hand
Palm is Munekawa's "smallest" coin case. It measures approximately 5.7cm long x 6.4cm wide x 6mm thick (lid part approx. 1.1cm) and weighs about 12g. It can hold about 10 to 15 coins.

The lid acts as a tray, and when tilted, coins gather on the lid, creating a structure that makes the contents surprisingly easy to see despite its small size. Even with a cashless lifestyle, there are many situations where small change is needed. If it's small enough to tuck into a corner of your pocket, it won't be a burden to carry around.
Summary | Going out light with just your smartphone
Keys, cards, coins, anti-loss tags. Re-evaluating your daily essentials based on the size of your smartphone might make going out empty-handed even more effortless.

The five items introduced here are leather accessories primarily made from vegetable-tanned leather, designed to become more familiar to your hand the more you use them. We also offer repair consultations if any issues arise during long-term use.
Each item can be seen in person at our direct store in Okokucho, Osaka, in addition to our online store. Try starting by swapping out one item in your pocket.
▶︎Click here for details on Munekawa's direct store in Okokucho, Osaka