A field of red. In the canton, a gold hammer and sickle crossed under a gold-bordered star of red. On the reverse, a field of red.
The 1977 Constitution did not change the description of the USSR flag. On August 15, 1980, by the Decree of the USSR PVS, a new edition of the "Regulations on the State Flag of the USSR" was adopted, which also did not make any changes to the description of the flag.
In the appendix to the new edition of the Regulation on the State Flag of the USSR, approved by the Decree of the Presidium of the Supreme Soviet of the RSFSR of August 15, 1980 (approved by the USSR Law of October 23, 1980), the images of the sickle, hammer and stars were missing on the reverse side of the State Flag of the USSR. [Vexillographia.ru]