Put on a pair of flexible work gloves.
Hold the tile firmly with the sharp edge turned away from you.
Rub the tile sander sheet lightly over the cut edge of the tile.
Wipe the tile with a dry rag to remove sanding powder buildup, then examine the tile. If it's still too sharp, continue sanding the edge until it's as smooth as you like.
Fasten a diamond-crusted blade or a diamond-tipped bit to a handheld rotary or oscillating tool.
Put on safety glasses or other eye protection and flexible work gloves.
Grip the tile firmly with one hand.
Turn on the rotary or oscillating tool.
Gently and slowly pass the cut edge of the tile along the blade or bit. Pressing hard can cause chips in the tile’s glaze. For a circular blade or the blade of an oscillating tool, pass the cut edge of the tile along the flat side of the blade near the outer edge. Do not cut into the tile with the edge of the blade. If you're using a diamond-tip bit, pass the edge of the tile along any part of the tip.
Turn off the tool, wipe off the dust and examine the tile. If it's not smooth, sand the edge until you're satisfied with the result.