A sewing machine includes an embroidery frame moving portion, a sewing portion, a communication portion, a processor, and a memory. The memory is configured to store computer-readable instructions that cause the processor to perform the steps of specifying an embroidery pattern and a size of the embroidery pattern, outputting the size of the embroidery pattern through the communication portion to a device provided with an image capture portion, acquiring positioning data through the communication portion, setting at least one of a position and the angle of a embroidery pattern on a sewing workpiece based on the positioning data, acquiring embroidery data, and causing the embroidery frame moving portion and the sewing portion to form stitches that make up the embroidery pattern on the sewing workpiece based on the embroidery data. The positioning data have been computed by the device based on image data and output to from the device.