This article specifically introduces the application possibilities of small-sized drones, which is scientifically a lightly researched area. In contemporary research involving drones, the focus is typically on large and expensive models. It is the problem. This article introduces new, unpublished methods to the most recent and breakthrough applications of small drones. The findings are derived from proprietary scientific measurements, encompassing extensive flight hours and a diverse range of drone types utilised in real-world mission scenarios. The result is that the characteristics of small drones better meet the challenges of the modern era. They are more manoeuvrable, easier to transport, and offer numerous advantages over larger models that have not been published. Equipped with FPV (First-Person View) functionality, they can be remotely controlled from locations where there is no direct optical visibility of the drone. They are capable of transmitting live 4 K resolution images or any desired digital data to a ground station, where the data can be processed and evaluated in real-time. Due to their small size, they are much less likely to cause damage to their surroundings. Thanks to their compact dimensions and protective frames, they can safely navigate through narrow spaces and approach valuable or hazardous objects. They are also highly effective in post-disaster scenarios, where they can be used to inspect even the interiors of buildings and vehicles. This article presents the current application possibilities of small-sized drones and highlights the future research areas proposed by the author.