We use BumGenius one-size pocket cloth diapers and gDiaper hybrids during the day. In order to make the few we have last longer, I made a few extra liners out of 3 layers of microfiber towels cut to 6.5" x 12'". I just sewed a simple zig-zag around and then applied some Fray-Check to the edges because, man, does cut-up microfiber make a mess! Definitely keep a lint-roller handy when you make these! :)
Stay tuned for more cloth diapering tips in this coming weekend's edition of Gidget's It's The Absolute Ulitmate!