App note from Coilcraft on determining the self resonant of an inductor and how to compare them to other identical inductors. Link here (PDF)
When comparing published electrical values, engineers require a common basis for comparison. Ideally, a 100 nH inductor with a self resonant frequency (SRF) of 1 GHz from one manufacturer is equivalent to inductors with the same published values from every other manufacturer. Realistically, however, the test instrument and fixture affect the SRF measurement. Since all manufacturers do not use the same instruments and fixtures, not all published SRF specifications are equivalent, which makes inductor comparisons difficult.