cut fringes along the bottom of a tshirt
Lay the shirt flat on a table and measure a line one to tow inches from the bottom and make a mark. Cut from the bottom to the line, over and over again until the fringes are all even and thin
Put the shirt on and cut small, thin fringes straight up from the bottom with a pair of sharp scissors until the shirt has as many fringes as you want. Cut over and over again until the shirt looks like you want it to