Use a flexible measuring tape or piece of string, and gently wrap it around the child's wrist, just below the wrist-bone, in the same place where you would place a watch. Then lay the string out straight and measure it using a ruler. Add ½” to the measurement to obtain the proper bracelet size. Follow step by step my tutorial and knowing my bracelet length and the beads number used, your child measurement it will help you calculate your desired length . Good luck!!!