A new viscometric method, which consists of plotting the inverse of the intrinsic viscosity versus the inverse of the square root of the molecular mass (Dondos and Staikos, Colloid Polym. Sci., 1995, 273, 626) has been applied for the determination of the statistical segment length of a poly(p-phenylene) ribbon-type polymer (Me-LPPP). The same method has also been applied to determine the statistical segment length of other wormlike polymers with viscometric data taken from the literature. The values of the statistical segments obtained using this new method are in close agreement with the values obtained from other methods.