The small Cyclades belong to the Cyclades. They are really really small, so they have this name for real. You can find them also as lesser Cyclades.
They are: Koufonisia (they are two, Ano and Kato), Donousa, Irakleia, Schinoussa and Keros. Only these 4 are inhabited: Pano/Ano Koufonisi, Donousa, Iraklia and Schinousa.
We will be posting for the inhabited ones also posts with recommendations!
You can go with the normal ferries but keep in mind that you can also arrive from Naxos with Skopelitis, small Cyclades Line.
Links:
Yannis and Stella @Apollon, Naxos 