N. lalandii is a large and heavy-bodied species for its genus. Adults usually have a snout-to-vent length (SVL) of , but can grow to slightly more than in SVL.Branch, Bill (2004). Field Guide to Snakes and other Reptiles of Southern Africa. Third Revised edition, Second impression. Sanibel Island, Florida: Ralph Curtis Books. 399 pp. . (Nucras lalandii, pp. 168–169 + Plate 61).
