Ahh these are brilliant, I am waiting for a commission at the moment, seeing these I really can't wait!
I would definitely recommend just emailing Emily and asking questions too, she was really helpful and happy to give an idea of pricing before you agree
Emily has a Facebook page called Emily-cole illustrations. If you search for it it should come up and give details so you can contact her directly. The price varies depending on what you want/size/number of animals etc. she is friendly and helpful so sure she an let you know anything you need to know