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About us

Sizing Science makes the manufacturing and fashion industries more sustainable and efficient for over ten years now. Here you can read more about the company and about who we are.

Sizing Science

Sizing science has its origins in science. By adding science to the art of sizing we are able to define and calculate the optimal fit of your products.
10 years of experience

Sizing Science was founded in 2010 by Professor Hein Daanen, as a spin-off of TNO, the organization for applied scientific research in The Netherlands. There was a need for consultancy regarding sizing and fit, based on anthropometric data and solid statistics. Sizing Science has worked for over 15 companies, and played a role in various advisory bodies in the field of body and clothing sizing.


In 2021, Sizing Science won the NATO Human Factors and Medical Panel award for its leading role in research and technology group 266 on 3D body scanning for clothing fit and logistics

Sizing Science is involved in standardization, is affiliated with several universities and has an extensive network in the clothing industry.


We believe in a sustainable future where supply and demand can be properly matched. Through adding science and technology to the art of sizing, we contribute to reducing returns and more user satisfaction. We are happy to play a role in making these methods and technologies accessible and applicable, thus making the clothing and manufacturing industry more sustainable.

Our people

We are a diverse and experienced team. By combining our knowledge and expertise, we can provide you with the best possible service.

Head of Research

Hein Daanen

Hein Daanen is professor in Physiology at the Faculty of Behavioural and Movement Sciences of Vrije Universiteit Amsterdam and head of research at Sizing Science.

He studied human movement sciences and has a track record in management, anthropometry and physiology.

Please visit www.heindaanen.nl for more info.

Head of Business

Lieske Yntema

For Sizing Science, Lieske is the first contact with the client. She studied at the TU Delft and has done process optimization projects for several companies. 

She has an analytical and positive attitude and sees well where the opportunities lie. By outlining the steps together with the client, the goal can effectively be achieved.

Head of Technology

Mats Mulder

Mats is a young entrepreneur with lots of energy and good ideas. He studied at technology universities in Delft, Finland and Switzerland.

He is both analytical and practical in nature, enabling him to quickly grasp problems and to propose and implement effective technology solutions. With a master's degree in computer technology and a specialization in cloud solutions

Our services

We use different methods to be able to help you in the best possible way. Below we give an overview of the services we offer. Here we have made a distinction between the makers and the retailers.

How can we help?

We would like to get in touch with you. We see many opportunities to optimize the sizing of your products. You can contact us for an informal meeting.