Different types of glass: For my fish, I used sheet glass, frit glass and stringers. The sheet glass is smooth and flat, normally in a 12x12 square. From the sheet glass, you can cut all of your shapes you need. The frit glass is essentially glass powder, you can put glue down and sprinkle the frit over or you can put the frit on it and spray hair spray over it. I preferred to use the hair spray method. The stringers are long stretched out pieces of glass put into long sticks. They are very frail and can be broken easily.