A cutter element for a drill bit configured to drill a borehole in a subterranean formation, the cutter element comprising: a base portion having a central axis, a first end, a second end, and a radially outer cylindrical surface extending axially from the first end to the second end; a cutting layer fixably mounted to the first end of the base portion, wherein the cutting layer includes a cutting face distal the base portion and a radially outer cylindrical surface extending axially from the cutting face to the radially outer cylindrical surface of the base portion, wherein the radially outer cylindrical surface of the cutting layer is contiguous with the radially outer cylindrical surface of the base portion; wherein the cutting face comprises: an elongate raised ridge extending across the cutting face, wherein the raised ridge has a first end at the radially outer surface of the cutting layer and a second end at the radially outer cylindrical surface of the cutting layer, and wherein the raised ridge defines a maximum height of the cutter element measured axially from the second end of the base portion to the cutting face; characterised in that the raised ridge comprises a central surface, a cutting surface extending radially from the central surface toward the radially outer cylindrical surface of the cutting layer, and a relief surface extending radially from the central surface toward the radially outer cylindrical surface; a first planar lateral side surface extending from the raised ridge to the radially outer cylindrical surface of the cutting layer; and a second planar lateral side surface extending from the raised ridge to the radially outer cylindrical surface of the cutting layer. a base portion having a central axis, a first end, a second end, and a radially outer cylindrical surface extending axially from the first end to the second end; a cutting layer fixably mounted to the first end of the base portion, wherein the cutting layer includes a cutting face distal the base portion and a radially outer cylindrical surface extending axially from the cutting face to the radially outer cylindrical surface of the base portion, wherein the radially outer cylindrical surface of the cutting layer is contiguous with the radially outer cylindrical surface of the base portion; wherein the cutting face comprises: an elongate raised ridge extending across the cutting face, wherein the raised ridge has a first end at the radially outer surface of the cutting layer and a second end at the radially outer cylindrical surface of the cutting layer, and wherein the raised ridge defines a maximum height of the cutter element measured axially from the second end of the base portion to the cutting face; characterised in that the raised ridge comprises a central surface, a cutting surface extending radially from the central surface toward the radially outer cylindrical surface of the cutting layer, and a relief surface extending radially from the central surface toward the radially outer cylindrical surface; a first planar lateral side surface extending from the raised ridge to the radially outer cylindrical surface of the cutting layer; and a second planar lateral side surface extending from the raised ridge to the radially outer cylindrical surface of the cutting layer. an elongate raised ridge extending across the cutting face, wherein the raised ridge has a first end at the radially outer surface of the cutting layer and a second end at the radially outer cylindrical surface of the cutting layer, and wherein the raised ridge defines a maximum height of the cutter element measured axially from the second end of the base portion to the cutting face; characterised in that the raised ridge comprises a central surface, a cutting surface extending radially from the central surface toward the radially outer cylindrical surface of the cutting layer, and a relief surface extending radially from the central surface toward the radially outer cylindrical surface; a first planar lateral side surface extending from the raised ridge to the radially outer cylindrical surface of the cutting layer; and a second planar lateral side surface extending from the raised ridge to the radially outer cylindrical surface of the cutting layer.