Need a set of micro drills or pin gauges. Drills can be bought at a hobby and model shop or industrial/machinist supply.
Use the shank of the drill bits to measure the hole size.
A set like this has #80 to 61 bits.
Photos here: Carb tuning, larger accelerator pump nozzle?
Example of a set here: McMaster-Carr
You may also be able to use a spark plug gapping set if its the type with the open wire of sizes up through .035" or so.
The IFR should be here
But on a QF will more likely be here
They will probably be 0.033" to 0.037" - Just my guess.