Table 2 As the number of steps from Fig. 7 increases and each step gets smaller, to better approximate the ramp, the volumes gets closer to the ramp volume, but the surface areas remains much higher, due to the surface remaining locally rough

From: NeuroMorph: A Toolset for the Morphometric Analysis and Visualization of 3D Models Derived from Electron Microscopy Image Stacks

# Steps Surface Area Volume
2 (a) 134.0 48.0
4 (b) 133.0 40.0
8 (c) 132.5 36.0
True Ramp (d) 113.25 32.0