tiles decals

bordercars

we are about to tile the bathroom and have bought a white 250 x 330 tile, we are going from floor to ceiling and rather than put in a border we wanted to put a contrast tile from floor to ceiling a little like this laura ashley tile here, http://www.tiledealer.co.uk/Laura_Ashley/Isadore/Floral_Black_On_White.html

the only thing wrong with this is that this is a 250 x 400 and we are unsure if the differences in tile height might look odd.

has anyone got any experience with tile decals and know of who might be able to supply us with a design like the above or an art deco style.

thanks