This study focuses on the impact of droplets on a horizontal solid substrate using distilled water droplets. Due to initial kinetic energy, the droplet rapidly spreads outward upon impact until the viscous dissipation, along with the surface tension force, slows down the spreading. After a period, the droplet continues to spread at a slower rate while the film thinning rate becomes stagnant, resulting in a residual thickness. The primary objective of this work is to measure the residual lamella thickness formed on the surface after droplet impact. A measurement technique using a Chromatic Confocal Sensor is used here for the thickness measurement. This sensor allows to measure droplet thickness with high precision. Experiments are performed within a Reynolds number range of 6900 to 10300. Results from the experimental data are compared with an existing theoretical model, and the model is found to overpredict the residual thickness by up to 10.3%.