According to the company, you can choose from three watch cases (light metal, dark metal, and champagne gold), nine bands (incl leather, metal, and new metal moto-link design), and 11 watch-faces. As the watch-faces are software based, you can switch to anyone of the pre-loaded ones or the ones available in Google Play, even after getting the customised Moto 360 from Motorola.
The cheapest customised Moto 360 costs $249.99 at the Moto Maker and the price can go up to $329.99 depending on what you choose.
The number of customisations might not as expansive as what Apple is offering for its Apple Watch, but they are decent in number and will most likely be increased by the company going forward.
