  We present a study of the shape, size, and spatial orientation of
superclusters of galaxies. Approximating superclusters by triaxial ellipsoids
we show that superclusters are flattened, triaxial objects. We find that there
are no spherical superclusters. The sizes of superclusters grow with their
richness: the median semi-major axis of rich and poor superclusters (having at
least 8 and less than 8 member clusters) is 42 and 31 Mpc, respectively.
Similarly, the median semi-minor axis is 12 and 5 Mpc for rich and poor
superclusters. The spatial orientation of superclusters, as determined from the
axes of ellipsoids, is nearly random. We do not detect any preferable
orientation of superclusters, neither with respect to the line of sight, nor
relative to some other outstanding feature in the large scale structure, nor
with respect to the directions of principal axes of adjacent superclusters.
