Technical drawing depicts a "cripple" door and frame, specifying dimensions for construction. Door size appears roughly 3' wide x 7' tall based on standard stud measurements.
The image you sent is a technical drawing of a door and its surrounding frame. The drawing includes specifications for the door's height, width, and thickness, as well as the dimensions of the surrounding studs and trim.
There is also a note that the door is "cripples," which means that it is a short door that is not intended for full-height use.The drawing is likely part of a larger set of plans for a building or renovation project. It is important to note that the scale of the drawing is not specified, so it is difficult to say for sure how large the door is.
However, the dimensions of the studs and trim can give us some clues. For example, the 2x4 studs that are commonly used in framing are typically 1 1/2 inches wide and 3 1/2 inches tall. Based on the scale of the drawing, it appears that the door is about 3 feet wide and 7 feet tall.