Yes, the Milky Way is getting bigger. It is estimated that the Milky Way is consuming about 10 solar masses of gas and dust every year. This material comes from the surrounding intergalactic medium, as well as from the cannibalisation of smaller galaxies that are merging with the Milky Way.

As the Milky Way grows in mass, it also grows in size. The radius of the Milky Way is estimated to be about 50,000 light-years. This means that the Milky Way is about 100,000 light-years across. The Milky Way is expected to continue to grow in size and mass for several billion years to come.