Curved or irregular cuts: Glass nippers, used on smaller tiles.

Nippers are easy to use and are good for smaller tiles or cuts whose edges will be concealed by a rim or fitting.

Nippers are not precision tools, and on larger tiles they are often impractical. Ring saws, band saws or reciprocating wire saws designed for glass are the simplest tools for cutting exact curves onto glass tiles. These tools can be expensive. It may be simpler to take the tile into a glass shop for cutting or to use coring drill bits creatively.