For dealers, they estimate your position at the table based on how they think other players would fit at the table around you.
From my observations and conversations with dealers I gather dealers use the section of the rail where the player puts his/her chips to determine where to place that player’s chips in the number boxes.
Agreed - this is how many dealers estimate “how other players would fit around” another player. But you’ll also notice that there are usually more than 8 separated sections in the rail per side - so this is only guideline.








