knob query

[dooft11]

Dear all
Fancy for a Fodera type preamp layout, but i never own a fodera.
i simply want to use smaller knobs for the high mid low while using standard knobs for vol and bal
can anyone tell me what is the diameter of the small knob, because it seems that no too many shop carry those knobs, if you know any, please tell me thanks

 

[tplyons]

There are two common sizes of knobs, some Ibanez have this... my SR400 had a larger volume and blend knob while the EQ knobs were smaller.