ProTaper: Sizes & Codes

ProTaper instruments are manufactured in six sizes: Three shapers and three finishing files.

SX file (no color ring) is 19 mm long and has varying tapers of 3.5% (D1), 19% (D9), and 2.0% (D14). The tip of the instrument is 0.19 mm in diameter.
S1 (violet) has a tip diameter of 0.185 mm and a taper from 2% (D1) to 11% (D14).
S2 (white) has a tip diameter of 0.20 mm and a taper from 4% (D1) to 11.5% (D14).
The diameter of all three Shaper files at D14 is the same, 1.19 mm.

F1 file (yellow) has a tip diameter of 0.20 mm. The taper is 7% at D1 and 5.5 % at D14.
F2 (red) has a tip diameter of 0.25 mm. The taper is 8% at D1 and 5.5 % at D14.
F3 (blue) has a tip diameter of 0.30 mm. The taper is 9% at D1 and 5.0 % at D14.
The diameters of the F files at D14 are 1.02 mm, 1.11 mm and 1.16 mm, respectively.