Wingspan 11-13.5 mm.
This moth is very widespread throughout Britain, but is found sparingly and locally.
The larval case is very distinctive when fully grown as it is a pale pink colour and has a double dorsal keel.
The moth is univoltine - being found in June and July. It favours two habitats, being found in coastal areas, where sea campion (Silene maritima) grows, or woodland - where its foodplant is stitchwort (Stellaria spp.).