To get the voxel dimension is a little tricky. I’m inclined to agree with the answer that Anim gave: 0.29 mm by 0.29 mm by 1.0 mm. The voxel dimensions are hard to pin down. This is because the voxels are not actually plotted on the axis of a piece. Instead, they are more like pixels. They’re usually inferred by a rendering system.
If they’re there, they show up on the screen. If they’re not there, they don’t show up. It’s as simple as that. That said, the answer that might make the most sense was given by Anim. I’m not sure what Adney’s answer is supposed to mean, but it looks very professional. That said, I don’t think it’s right.