A sixteenth (1/16) is a "teeny", so 1/32 must be a semi-teeny, 1/64 must be a demi-semi-teeny, 1/128 must be a hemi-demi-semi-teeny, and 1/256 must need an electron microscope for identification?
Not sure but we can make it up: If a sixteenth (1/16) is a "teeny" then a 1/32 has to be a 'weeny' Now the term 'teeny weeny' reminds me of the old song so: 1/64th can be an itsy 1/128th can be a bitsy
Xela be pulling the Close Encounters of the Third Kind thing out of the bullpen there, with the semi-demi half quavers.
The fractions are simply the minimal tick size - stocks used to be traded the same way before decimalization began in 2001. 1 point = $,1000 Ticks per point = 1 point/decimal tick size
In the olden days before decimalization and penny/subpenny quotations, 1/16 was a "steenth", like five and seven steenths by thirteen steenths.