Size: 3-4mm
Basic colour: Bright metallic blue, sometimes purplish, rarely bronze-brown or brassy.
Pattern colour: None
Number of spots: None
Other colour forms: Sometimes
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Phaedon armoraciae
, Confusion species: Phaedon concinnus

Size: 3.5-4.7mm
Basic colour: Deep blue.
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Phaedon cochleariae

Size: 7.5-11.5mm
Basic colour: Red/orange-red and black.
Pattern colour: Pronotum black, elytra red/orange-red (rarely yellow) with black spots
Number of spots: 6 (3 per elytron), though usually appears to be 4 as the posterior spots are generally fused; the shoulder spots are smaller than those on the disc which when fused almost form a transverse band. Several variations occur, ranging from the discal spots being absent to being fully fused including across the elytral suture.
Spot fusions: Very common
Other colour forms: Rare
Pronotoum: Black

Size: 6-9mm
Basic colour: Head, pronotum, legs and body dark metallic greenish or greenish-blue; elytra yellow-brown.
Pattern colour: None
Number of spots: None
Pronotoum: See 'basic colour' above
Leg colour: As pronotum

Size: 3.9-5.0mm
Basic colour: Metallic blue or violet (rarely green) with pronotum, legs and antennal segments 1-4 orange-red
Pattern colour: None
Number of spots: None
Other colour forms: Rare
Pronotoum: Orange-red
Leg colour: Orange-red with variably dark tarsi