> How would you define large and small? Is 10uF large?

10uF would be a small electrolytic, a large non-polarised

A leakage figure for a general purpose aluminium electrolytic
< 1000uF might be something like 0.01CV or 3uA, whichever
is greater

Larger values, > 1000uF, might be 3CV, +100uA if > 100V,
which can be several mA

so you work out from that what the leakage will be for the voltage
and uF you use and whether it's significant. For example a high
value resistor, eg several Meg, and a cap that leaks a few uA is
going to be a terrible RC combination, because the small current
available through the resistor is leaking away through the cap, not
charging it

The above applies mostly to aluminium electrolytics. Ceramic,
plastic [and tantalum, bearing in mind uF tolerance] caps are
better suited for timing
--=20
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