How do I use tile spacers?

I tile every day of my life, and usually hang out in DIY. Tile spacers come in two sizes, 1/4 and 1/8. For a counter top I suggest 1/8. You already know they look like (+) signs, and many have rounded tips. They are also sold in what looks like a round CAP with the plus sign under that allows for corner spacing and alignment. I do not use corners specifically, in laying the spacer flat, primarily through experience, but many suggest that method. You would set a piece of tile, then another in close proximety, using the spacers to align and keep the tiles at an exatc distance from each other. The spacer also makes a great "scoop" for wiping out excess mortar or mastic that squeezes up into the grout lines. I suggest 1/8 for countertops because of the purpose of the top and having the least amount of absorbent material, against the greater flat/flush surface that a counter top should be. Without knowing at all, your tile, or design, I also prefer a tile style that has bullnose sold in ...  more