"Keiron" wrote in message
...
hi all. i need a 23.4mm or 24mm seatpost. happy to donate a nominal
monetary
prize to the helpful soul. please get in touch.

The smallest standard seatposts are 25 mm. You can get these from American
Classic or Thompson.

Some older supermarket bikes had 7/8" seatposts which are 22.25mm and are
usually impossible to find except in a bike store that repairs these things.
Also the seatpost this size doesn't have a build-in bracket so you have to
have a seat bracket as well.