Two stacking mugs in navy color with lighter blue dripping glaze at the top. Made in Japan in the 60s.

Measurements:
Diameter – 7 cm | 2.7 inches
Width – 10.5 cm | 4.1 inches
Height – 9 cm | 3.5 inches

Condition – a tiny chip near the base of one mug, the other one in a very good condition.
Marks – Japan.