What are the different types of Bob haircuts in the 1920's?

In the 1920s, the bob haircut gained immense popularity and came in various styles. The classic bob featured a straight cut around the head at jaw level, while the longer "shingle bob" had shorter layers at the back and longer pieces in front. The "graduated bob" added volume and shape, tapering from longer front sections to shorter back layers. Additionally, the "curly bob" incorporated soft waves, reflecting the era's flapper culture and its embrace of a more liberated feminine aesthetic.