The axial distribution of carbon dioxide clusters in supersonic gas jet was studied by Rayleigh Scattering method. It is found that the logarithm of scattering signal ln(S) decreases linearly with the square root of Z and the position of 4 mm rather than the position nearest the nozzle has the maximum average cluster size. The scattering signal intensity exhibits a power scaling on the backing pressure ranging from 6 to 17 bar , and the power varies from 3.6 to 4.2. The axial cluster size was estimated and the maximum size was found to be 16 000 molecules/cluster.