The architectural drawings that show the size of the building are called "floor plans."
Step-by-step explanation:
Floor plans are two-dimensional representations of a building's interior spaces, and they are typically drawn to scale to show the layout and dimensions of each room or area. In addition to indicating the size of the building, floor plans may also show the location of doors, windows, walls, and other features, as well as the placement of furniture or equipment. Floor plans are an essential tool for architects, builders, and other professionals involved in the construction or renovation of buildings.