The flag of the Lithuanian SSR was first adopted by the Lithuanian SSR in 1940. The flag in use from 1953 to 1988 was a red flag with the golden hammer and sickle and a gold-bordered red star in its upper canton with the white thin stripe and green thick band on the bottom.
On July 15, 1953, a new flag was adopted. It was modified to meet the new requirements for all flags of the Soviet socialist republics. The top red portion took 2⁄3 of the width and incorporated the mandatory hammer and sickle and red star. The bottom part could be customized by each republic. Lithuania added a narrow white (1⁄12 of the width) and a larger green (1⁄4 of the width) strips.