The capacitive sensors are being extensively used for humidity measurement over a wide dynamic range. The most common structure is interdigital electrode fringing field capacitive sensor. The capacitance expression for the structure is not exact and the value depends on various parameters such as finger width, gap between two working and sensing fingers, number of fingers, shape of the finger, and the sensing film. Another commonly used structure is the sandwich parallel plates capacitance separated by dielectric sensing film. The expression is exact provided the effect of the fringing field is minimized using a guard electrode. This paper presents the design and fabrication of a novel planar cross-capacitive sensor for humidity measurement. Such structure is not normally reported for humidity measurement. The sensor employs a unique polymer-based sensing film made from Moistane eye drops, which responds effectively to variations in humidity levels. Experiments were conducted to determine the sensor's static response across a humidity range of 10 to 90% RH. The results demonstrate the sensor's capability for accurate humidity detection, making it a promising candidate for applications in environmental monitoring.