A cosmological model with variable c, h, G is proposed. The characteristic lengths of physics (Compton, Jeans, Schwarzschild) are assumed to vary like R(t). Both light and matter’s worlds are found to obey the same law R≈t2/3. The Planck constant is found to vary like t and the gravitation one like 1/R, while the Planck length vary like R. The particle masses follow m≈R. The Hubble law still applies. The redshifts come from the secular variation of the Planck constant.