The formats listed below are mostly designed for a group size of a maximum of 40 participants. On the one hand, there are technical reasons for this, as BigBlueButton - the video conferencing solution used in the DINA conference centre - reaches its transmission capacity with (at the most) 40 videos streamed simultaneously. On the other hand, we are also aware that the bigger the conference, the more effort goes into planning and support during implementation. We believe in formats that are interactive and invite and activate all participants to get involved and help shaping the conference. Delivering on this promise requires good moderation and also the possibility of providing a continuous live feedback loop (be it via audio track or chat). With increasing numbers of participants, implementing all this becomes more complicated. A well-planned session can easily turn into a complex event in which it is very challenging to ensure that the space is appealing to all different groups of people involved. In order not to overwhelm either the implementing team or the participants, we recommend not to exceed a group size of about 40 participants. If you wish to plan larger settings, get professional help: the betterplace lab which wrote this manual or the Stiftung Bürgermut (and for sure many others - also in your country) offer advice and implementation support.