Further to the Keyboard Cowboy's post,
@JohnnyPunk, there are preferred places for some of these types.
In a Muff, for instance, 100n Ceramics were used by EHX in days of old.
Nowadays it's more likely to be a 100n Film cap, as the signal to noise ratio is likely better with Film — yet some DIYers will still build a Muff with 100n Ceramics to be period accurate to whatever Muff variant they are building because it won't sound right otherwise.
About as debatable as Hannibal Lector having an Amarone (originally in the book) to accompany his Census-Taker's liver with fava beans, as opposed to a Chianti as referred to in the film,
because the film-producers thought not enough of the film-audience would know what Amarone is and why it pairs well with offal (such as liver and hunted game).
Generally speaking:
Small value stuff, ex 30p-120p
Ceramics
Medium value, ex 1n–1µ (can be as big as 2µ2 or even 4µ7)
Film Box
Big Value, ex 1µ–100µ
Electrolytics
What scale p <> n <> µ?
100 pF = | .10 nF = | .00010 µF |
100,000 pF = | 100 nF = | .1 µF |
1,000,000 pF = | 1,000 nF = | 1 µF |
As you become more familiar with building, you'll get a better feel for when to use what.
Thp-thp-thp-thp-thp...