Antique Porcelain Blue And White Double Happiness Tea Cup

Colour: Blue and white
Period: 19th - early 20th century
Size: L: 5.5 - 5.9 cm,  H: 3.3 - 3. 6 cm (each cup has different size)
Marks: No, "Double Happiness Design" on cups.
Capacity: 25 - 35 ml (0.85 - 1 oz)
Condition: Good antique condition. Variation in size. In uneven shape and imperfections like fire pits and tiny frits.