SPACERS AND JOINT SIZES?
I like to use joint spaces about 1/8th inch wide if the tile are uniform enough. It is best to remove tile from several boxes and lay them down with the joint size you would like to see. Measure several tiles in a row including the joints to see what size grid you should draw on the floor. For walls, I like to use plastic spacers along with the little plastic wedges for fine adjustments. Larger joints are fine if that is the look you want. Please check your work with a long straight edge quite often because the spacers only follow the tiles and some of them are not uniform.