THE GLOVEMAKER’S SECRET: THE INHERENT CAPABILITY OF LEATHER
When I began my ”apprenticeship” with the former owner of Rhanders Glove Factory, Arne Vejrum, in 2018, we spent hours with the leather in our hands. I had worked with textiles and leather for 25 years, but this was at an entirely different level of expertise. We felt the thickness, firmness, and structure of each individual hide in a batch. We sorted them into women’s and men’s leathers, and meticulously according to glove sizes.
Arne could hold a piece of leather — sometimes with his eyes closed — and say:
“This hide will be perfect for a women’s size 7,” or “This is a men’s hide, suitable for the larger sizes.”
It almost seemed mystical.
It reminded me of a story I had heard about so-called “chicken sexers.” You cannot immediately see whether a chick is male or female — but through experience, after handling hundreds, even thousands, of chicks, one develops a particular sense. An experienced chicken sexer can sort them with eyes closed.
In the same way, a piece of glove leather can speak to you. It can tell you whether it is suited for men’s or women’s gloves — and even which size it will perform best in.
There are, of course, measuring instruments for leather. And we had them at hand — perhaps especially to reassure my Ph.D.-trained mind that there was data behind the intuition.
But measurement alone cannot tell us about the firmness of the grain, tear strength, softness, or the spongy, “fatty” character. Whether the hide comes from a young, resilient animal or an older one with looser connective tissue. Nor can it measure what we in practice refer to as the leather’s “capability” — its ability to stretch, adapt, and take shape according to the glovemaker’s intention.
But how could one feel glove size in the leather? This was one of the greatest puzzles to me. A typical men’s hide ranges between 0.8 mm and 1.0 mm in thickness. That means there is only about 0.2 mm difference between a size 8 and a size 10 glove.
This is not something easily detectable by hand alone — nor something the large shaving machine can fully standardise. The machine is set to approximately 0.9 mm, but the outcome can vary by up to ±0.1 mm depending on the structure and softness of the hide.
In practice, this means that no two hides have exactly the same thickness — even when the technical specifications are identical. And yet, Arne’s hands could feel the difference. Feel whether a hide would be suited for a size 8 or a size 10.
Here, quite honestly, a tension emerged between Arne’s lived experience and my preference for data and specifications. Craft versus automation. But I came to realise that the hand possesses a unique capability. Data and specifications are necessary — but the hand adds further dimensions. A sense of how a product will shape itself, and how it will endure over time.
After seven years of learning, I must therefore acknowledge that craftsmanship and the work of the hand contain a form of knowledge that cannot yet be fully measured. And that there is a reason why craftsmanship is passed down through generations.
And indeed – that there is a reason why Rhanders’ craftsmanship has been recognised for centuries, dating back to 1684.
I believe that the next chapter of my learning may be to explore the “intelligence of the hand” even further…
But before that, I will outline in factual and technical terms the variables we work with when selecting leather that is suitable, and worthy, of carrying the Kalmus mark.
RELATIONSHIP BETWEEN LEATHER THICKNESS AND GLOVE SIZE
In glove production, we have for centuries worked with a deliberate variation in leather thickness of approximately 0.2 mm, typically within the range of 0.8 – 1.0 mm for men’s gloves. This variation is not incidental, but an integral part of the design, ensuring optimal functionality, durability, and ergonomics across sizes.
1. Production Baseline
The leather is shaved at the tannery to a target thickness of approximately 0.9 mm. Due to natural variation in the material – such as fibre density, fat content, and elasticity – the actual outcome varies by approximately ±0.1 mm.
This results in a natural distribution within the same batch:
- approx. 0.8 mm (thinner, more flexible hides)
- approx. 0.9 mm (standard)
- approx. 1.0 mm (thicker, more structural hides)
This variation is actively utilised in the sorting process.
2. Material Properties
Leather is an anisotropic natural material, meaning its mechanical properties vary depending on direction and structure. The following properties are critical:
- Tensile strength – resistance to being pulled apart
- Tear resistance – resistance to point stress and wear
- Elasticity and recovery – ability to stretch and return to shape
- Drape – how the material conforms to a three-dimensional form
These properties correlate directly with thickness and fibre density.
3. Scaling with Glove Size
As glove size increases, three key parameters change:
- Surface area (larger hand → larger loaded area)
- Mechanical load (larger hands typically generate greater force)
- Structural tension in the material (greater span across seams and surfaces)
To maintain consistent performance and durability across sizes, material thickness is scaled accordingly.
4. Practical Implementation in Sorting
- 0.8 mm leather → small male sizes (size 7.5–8)
- Enables finer stitching and tighter construction radii
- Reduces bulk in smaller proportions
- 0.9 mm leather → medium male sizes (size 8.5–9.5)
- Balances flexibility and strength
- Standard choice for most applications
- 1.0 mm leather → large male sizes (size 10–11)
- Increases tear and wear resistance under higher load
- Provides greater structural stability across larger surfaces
- Prevents deformation and loss of shape over time
Across all sizes, high tactile sensitivity (finger feel) is maintained as a functional requirement.
This is critical in operational environments, where the user must be able to perform precision tasks — including handling equipment and weapons — immediately after deployment (e.g. after fast roping).
Material thickness is therefore not increased at the expense of tactile control, but optimised to ensure both protection, durability, and precision handling across all sizes.
5. Functional Outcome
By adapting leather thickness to size, a mechanically consistent user experience is achieved:
- Smaller gloves do not wear out prematurely due to insufficient material strength
- Larger gloves maintain structure and do not collapse due to overly soft material
All sizes achieve comparable durability and performance relative to the user.
In other words: the material is scaled so that functional strength remains proportional to the user’s load.
6. Limitations of Full Machine Standardisation
While thickness can be measured instrumentally, the following parameters cannot be fully standardised:
- Fibre resilience and “snap”
- Distribution of natural oils within the leather
- Local structural variation (back vs. belly of the hide)
- The material’s ability to form and maintain a three-dimensional shape
For this reason, technical specifications are combined with manual sorting based on tactile evaluation.
This differentiation can be compared to engineering design, where material thickness is increased in proportion to load in order to maintain a consistent safety factor.
THE VOICE OF CRAFTSMANSHIP – A COMMENTARY ON THE TECHNICAL EXPLANATION
After documenting the technical explanation, I sent it to Arne to get his feedback. It came promptly:
“I hope that this academic formulation of matters concerning ancient knowledge and experience within material understanding and function will appeal to some. But when expertise is formalised in this way, it loses some of its charm.”
His response was, as always, precise. Because while the technical explanation describes the principles correctly, it does not capture the full picture. It explains what we do—but not fully how it feels, or how it is learned. The charm — and part of the precision — lies precisely in the craftsmanship.
In the experience held in the hands. In the inherent properties of the leather — and in what it “tells” the one who has learned to listen.
It is in this tension between the measurable and the sensed that true craftsmanship emerges.
Written by Rina Hansen, CEO and Owner