Coccinella septempunctata vs Coccinella quinquepunctata
Two congeners together, for size comparison. The Five-spot can sometimes have an extra spot in front (tiny one on the image below), making it look a lot more like the Seven-spot. In that case the size can be helpful.
The Five-spot Ladybird (Coccinella quinquepunctata) is the smallest representative of the genus Coccinella in Northwestern Europe measuring just 3-5mm.
Similar species: Beetles