The Cuba and Puerto Rican flags are very similar : r/vexillology

Puerto Rico's flag Identity crisis in a nutshell: : r/vexillology

The best of /r/vexillology — Cuba and Puerto Rico's flags compared are

Historical Puerto Rican Flags 🇵🇷 : r/vexillology

Spanish Empire Flag Spotted in Puerto Rico : r/vexillology

Hispanic Flags With Similar Flags from Around the World

Municipality Flags of Puerto Rico : r/vexillology

Small collection of LGBTQ+ Cuban flags : r/vexillology

Union of Puerto Rico-Cuba and Kingdom of Two Dominicas : r/vexillology

Redesigns for Puerto Rico, Cuba, and Catalonia, so they are easier to tell apart. : r/vexillology