 It's the second largest tarsier; only the Sangihe tarsier is larger; published body weights are 67 to 117 g.

The Lariang Tarsier ("T. lariang") is portrayed by its dark grey-buff pelage, thick black pencil-like tail, finely marked black paranasal stripes, along with the form of black eye rims that distinguish it from its neighbor to the east ("Tarsius dianae).