thick chopsticks with both ends equally thin
Refers to a particular style of chopsticks that are thick in the middle and taper to equally thin ends, often used in traditional settings.
At traditional Japanese restaurants, haramibashi chopsticks are sometimes used.
The term 孕み箸 (はらみばし) literally means 'pregnant chopsticks', likely referring to the thick middle section resembling a pregnant belly. The exact origin is uncertain.