These small moths were mating in my garden. Length was about 6 mm (giving approx. 12 mm wingspan), measured by photographing adjacent to a scale. (I think they were on an aster family plant, but am not completely sure.) See comments here:



This is deemed to be likely a Scythris, possibly Scythris fusciomella or a related species. Thanks to Bob Patterson and colleagues for help on ID.
Image updated 6/12/20 and moved to species level, fingers crossed.