Question: are faucet aerators a standard size?
Answer: The most basic thing you need to know about your faucet in order to replace or add an aerator is the threading - either male or female. ... Typical "Regular" size for a faucet aerator is 15/16" male threaded or 55/64" female threaded, while "Junior" size is 13/16" male threaded or 3/4" female threaded.