This is a very bold look so you better be very sure it is what you want. This green tile really give this bathroom a wow factor. Having the smaller tiles allwos for more grout to give the room a bit more depth.
Two excellent sources for grass green and kelly green mosaic bath tiles---albeit for a shower or a backsplash---are Ann Sacks and Waterworks. Depending on what you're looking for, mosaic tile can also be super cost-effective based on which finish and/or material you choose. http://www.annsacks.com http://www.waterworks.com