I'm curious as to why you moved her hands, I liked how it was with her hands and the tea cup, (however the final product is simply stunning and I love that as well) I'm just curious as your motives for changing the arms.
thank you very much id recommend approx 2500 by 2500 px if youre gonna be looking into drawing pictures with a lot of detail. the larger the file size obviously the larger the picture is going to be, the bigger the canvas size the greater the detail normally is. warning you though! takes forever to draw! haha. thanks again