IKEA furniture is well known for its modern, utilitarian design. Much of IKEA's furniture is designed to be assembled by the consumer rather than being sold pre-assembled. IKEA claims this permits them to reduce costs and use of packaging by not shipping air; the volume of a bookcase, for example, is considerably less if it is shipped unassembled rather than assembled. This is also a practical point for many of the chain's European customers, where public transport is commonly used; the flat-pack distribution methods allow for easier transport via public transport from the store to a customer's home for assembly. IKEA in Kungens Kurva, just south of Stockholm, Sweden IKEA in Kungens Kurva, just south of Stockholm, Sweden

IKEA contends that it has been a pioneering force in sustainable approaches to mass consumer culture. Kamprad refers to the concept as "democratic design," meaning that the company applies an integrated approach to manufacturing and design (see also environmental design). In response to the explosion of human population and material expectations in the 20th and 21st century, the company implements economies of scale, capturing material streams and creating manufacturing processes that hold costs and resource use down, such as the extensive use of particle board. The intended result is flexible, adaptable home furnishings, scalable both to smaller homes and dwellings as well as large houses.