What we today call working memory is closely related to executive processes, attention, consciousness, and intelligence. In order to understand human thinking it is of fundamental importance to understand the nature of working memory representations. In the literature on working memory, a prominent theme is its limited capacity. There are, however, several problems associated with the measurement of working memory capacity, which may contribute to inflated capacity estimates. In regard to visual working memory, earlier methods sometimes made it possible for people to enhance their performance with the help of verbal strategies, categorisation, and the use of long-term memory. A new method for measuring visual working memory capacity has been developed, in which people's use of strategies is minimized. When the influence of other processes and representations is examined beside the visual ones, the preliminary results indicate that the capacity of visual working memory is only one object. This is in contrast to recent capacity estimates of around four easily categorised objects, such as, for example, squares and triangles. With this new method, there will be an investigation of how limited visual working memory capacity really is, and the contributing factors to this limitation. In short: What, and how much, can we really represent in visual working memory?