These Aloe pearsonii leaves have well-spaced marginal spines, up to 5 mm apart. The deltoid spines are from 1 mm to 2 mm long, here whitish but sometimes dull red. The spines are comparatively crowded near the leaf-base where they are taller, widely spaced and shorter near the tip where they may be almost absent. Right at the tip there may be a pair of spines, a single one or none at all.
The leaves are about 8 cm long, up to 4 cm wide at the base and up to 1 cm thick at the base. There are slight reddish striping on the blades, channelled on top during drought (Frandsen, 2017; Van Wyk and Smith, 2003; Reynolds, 1974; Jeppe, 1969; iNaturalist).