In this article we present our rule of thumb for the sizing of solutions based on what an organisation can handle. Our primary goal is to make you aware of cognitive load theory and sociological considerations on organisational structure. Be aware that these are somewhat fuzzy theories, which are still debated and do not provide us with definitive answers. We are still convinced that taking these ideas into consideration helps in making organisations more effective. With our rule of thumb we hope to provide organisations a tool for conversation around how to effectively organize flows of work, without overloading and burning down teams.