Vintage, hand-made, cotton voile, sheer, embroidered Hungarian blouse in a women's small or medium.  Fabric is in very good condition with only loose threads in the seams.  The embroidery retains bright colors and looks great on this minimalist top.  Estimated it was made between 1930s-1950s, but probably on the earlier side due to fabric content.  Photos don't really do this pretty, little blouse justice.