Not really twice as long. Modern American generations are about 15 years in seperation. Zoomers are approximately 1995-2010, Millennials are approximately 1980-1995, Gen X is approximately 1965-1980. Boomers would have been considered 1950-1965, but the baby boom started right after WWII, so it's closer to 20 years in length rather than the usual 15. There's room for debate where Boomers end and Gen X begins, but there was no generation between them. Some self-ashamed Boomers like saying that 1960-1965 was akshually "Generation Jones" but it's a cope to distance themselves from popcorn ceilings, covering up hardwood floors with shag and running the economy into the ground.