Geometrinae
Geometrinae is the nominate subfamily of the geometer moth family. The geometer moth family has around 35,000 species of moths.
Geometrinae are small, light bluish green moths, leading to the common name of emerald moths. There are about 2,300 described species, mostly from the tropics.
Emerald moths have a wing span of less than an inch, about 15-20 mm or 0.59-0.78 inch.
H/t Project Noah
~Eowyn