A system for measuring dimensions and/or other internal properties of a shoe, garment or other object of interest is described. The system includes a fixture having a measurement tip. When the tip is placed inside of the object of interest, a processor collects positional data from the fixture to develop a three-dimensional model of the interior of the object. If the measurement tip includes one or more pressure sensors, the processor may collect pressure data and use the pressure data to include stretch properties in the three-dimensional model.