Typically, under 1 y.o, it'll be the 30mm snap clip.
Michelle (this Forum Owner) carries it and I only buy from her because of the sizing http://www.hipgirlclips.com/store/in...oducts_id=1663
Lining: Yes, with ribbon. You'll be using 3/8.
Attaching korkers: I'd say just glue it.
Are there any tricks or certain types that stay better in fine hair?
Nope, no tricks. Lined
snap clips stay put in fine hair. The hardware link above shows picture of it. You could also, instead of grosgrain, use Velvet ribbon to line. Ribbon size: same, 3/8.