I have smallish hands for a guitarist. One of the reasons I like my early 80s Japanese Strat is because it has a very slim neck. Other guitars that work well for smallish hands are Gibson Melody Makers, 60s profile SGs, Jrs, and Standards. Danos are very light and the old ones at least have slim necks. Other options are Duosonics but stay away from 3/4 scales. The classic chick rock guitar is a modded MM. I have heard that the Hello Kitty guitars that Fender put out were actually decent. I know a guy that bought one for his daughter and ended up using it on stage. Have her try a few. Get the one that speaks to her. The easiest to play will be a Tele if the neck is right.
Stage Guitars: '80s Thin line LP Custom, '70 LP Standard, '83 Squier Black Headstock Strat w/ Dan Torres pickups, '59 Black Danelectro DC, sometimes others.
Pedal Board: Nady UHF 10 -> TU2 -> Rocktron Big Crush -> 70s MXR Phase 100 -> Cry Baby -> Bad Monkey -> Early '80s Rat -> Early '80s Ibanez CS 9 -> Ibanez DE 7 -> Behringer Dr 100 Stereo Reverb
Stage amps: '63 Blonde Tremolux w/ two original 2X10 cabinets with a '60 Ampeg Rocket/18 watt VTB Marshall clone/ Epi VJ into a Mashall 1965A