Origami Paper Guide | Understanding Thickness, Size, and Structure

Paper is the most important factor in determining the quality of an origami work.

Even when folding the same model in the same way, simply changing the paper can dramatically affect both the ease of folding and the final appearance.

Learning to choose paper according to the model you want to fold and your intended outcome can be considered the first step toward becoming an origami artist.

Choosing Paper Through the Balance of Three Elements

When selecting paper for origami, it is essential to consider the balance of three elements: thickness, size, and stiffness (resilience). These factors do not function independently; rather, they interact with one another to define the character of the paper.

Thickness Determines Folding Precision

In general, thinner paper is better suited for intricate folds and becomes especially important for complex models. As paper becomes thicker, layers accumulate more quickly, making it harder to manage fine details and increasing the difficulty of achieving clean results.

At the same time, thin paper is more flexible, which means long edges can easily bend and flat surfaces may warp. Thicker paper, in contrast, offers greater stability and helps maintain clean, flat planes.

Ease of folding and structural stability are always in a trade-off relationship.

Size Creates Ease of Handling

Larger sheets of paper allow each step to be performed over a wider area, making the folding process easier overall. This is particularly beneficial for complex models, where working with a larger sheet provides more margin for precision.

However, larger paper also introduces challenges. Broad surfaces are more prone to distortion, and long edges can bend under their own weight. Therefore, size should be considered not only in terms of ease of handling, but also in relation to the stability of the final form.

Stiffness Defines the Character of the Paper

Stiffness refers to the tendency of paper to return to its original shape after being bent. Even papers of the same thickness can feel and behave very differently depending on this property.

Paper with strong stiffness feels firm and holds its shape well, while paper with low stiffness is softer and more fabric-like, allowing for expressive forms but making it harder to maintain structure.

Unlike thickness or size, stiffness is not standardized. It must be assessed by touch. A simple way to evaluate it is to gently press the edge of the paper and observe how strongly it pushes back against your finger.

The Ideal Paper Varies by Model

Some origami models require different material properties within the same piece. A dragon, for example, demands fine, detailed folding in the head while also requiring large, stable surfaces for the wings.

Thin paper allows for precise folding in the head but may cause the wings to lose their shape. Thick paper supports the wings well but makes detailed folding difficult.

In such cases, it is necessary to decide which aspect of the model to prioritize and select a paper that offers the best overall balance. Choosing paper is, in effect, part of the design process itself.

Paper for Complex Models

Models with many steps require both thinness and strength. Thin paper with good stiffness can withstand multiple layers while still maintaining its form.

Handmade Japanese washi and Korean hanji are representative materials that meet these conditions. Their long, interwoven fibers make them resistant to tearing and capable of enduring repeated folding and unfolding. Although more expensive, they provide significant advantages when working on complex designs.

Paper for Simpler Models

Traditional models with fewer steps, such as cranes or horses, often rely on clean geometric surfaces to define their form. If the paper is too thin, these surfaces can become distorted, resulting in a less refined appearance.

Using slightly thicker paper—such as tant paper or chiyogami, typically around 75kg in basis weight or approximately 100 gsm—can produce a more stable and elegant finish.

Paper Standards

When purchasing specialty or large-format paper, you will often encounter unfamiliar terminology. Understanding these standards will help you evaluate thickness and size more accurately.

Thickness Standards

Paper thickness is not usually expressed as physical thickness, but rather in terms of weight.

Basis Weight (Japan)

In Japan, thickness is commonly expressed using basis weight, which refers to the weight of 1,000 sheets of a specific paper size. Most commonly, this is based on the Shiroku-ban size.

For example, around 55kg corresponds to copier paper, 90kg to a firm printing paper, and over 135kg to card stock.

However, since this measure depends on the base sheet size, the same numerical value can represent different actual thicknesses depending on the paper format.

Grammage (gsm: International Standard)

Grammage refers to the weight of paper per square meter and is expressed in grams per square meter (gsm). Unlike basis weight, it does not depend on sheet size, making it easier to compare across different papers.

As a general guide, 70–90 gsm is considered thin (book paper), 100–150 gsm is standard for printing, and 200 gsm or more is considered thick. For origami, this provides a useful reference point for handling characteristics.

Size Standards

Paper is manufactured according to standardized dimensions depending on its intended use.

Shiroku-ban (Japanese Publishing Standard)

Shiroku-ban measures 788 × 1091 mm and serves as a fundamental size in Japanese publishing. Many books are produced by cutting this sheet, and the term is also used to describe the finished book size.

Kiku-ban (Japanese Publishing Standard)

Kiku-ban measures 636 × 939 mm and is commonly used for magazines and academic publications. It is slightly smaller than Shiroku-ban and suited for denser layouts.

Hatoron-ban (Packaging Use)

Hatoron-ban measures 900 × 1200 mm and is primarily used for packaging and kraft paper. Its large size allows it to be freely cut to suit different applications.

A Series (International Standard)

The A series is the most widely used international paper standard. A0 measures 841 × 1189 mm, and each subsequent size is obtained by halving the longer side.

A key feature of this system is that the aspect ratio remains constant across all sizes, making scaling straightforward and preserving layout proportions.

B Series (International Standard)

The B series follows a similar structure, with B0 measuring 1000 × 1414 mm. It sits between A sizes and is often used for posters and publications that require slightly larger formats.

Conclusion: Paper Selection Is Design

Choosing paper is not merely a matter of material selection; it is an integral part of designing the work itself. Decisions about how far to fold, which forms to emphasize, and how the finished piece will hold its shape are all embedded in the choice of paper.

Even an intuitive approach is a good starting point, but by consciously considering thickness, size, and stiffness, the accuracy of your choices will improve significantly.

As you become able to select paper with intention, origami evolves from a simple activity into a form of expressive creation.

Acquiring this knowledge and experimenting with different papers will gradually refine your sensitivity to material—and deepen your practice.

Tomoaki HamanakaOrigami designer