VARIOUS SIZES
The orange,green and pink head diameter are 2 mm/ 0.078 inch,
the blue head diameter is 2.5mm/ 0.1 inch,
the purple head diameter is 2.3mm/ 0.09 inch.
The dental brush length is approx. 6.9 cm/ 2.71 inches, brush hair length is approx. 1 cm/ 0.39 inch, 5 sizes of interdental heads to suit different sizes of teeth.