Fujifilm X-M1 is rumored to be an entry-level X-Trans camera from Fujifilm and announcement expected to be on June 25. The upcoming Fujifilm X-M1 will be a compact system mirrorless camera with small sizes.
Fujirumors has posted several images comparing the X-M1 camera with other Fuji cameras. Here are the size comparison of upcoming Fujifilm X-M1 and other X series cameras. Fujifilm X-M1 Vs. Fujifilm X-E1 Vs. Fujifilm X20 Vs. Fujifilm X100S.