Hey Muirs,
Yep - 130 ish is ballpark. I ride a 131x 39 twn tip (61kgs 174cms) and most girls I know ride between 128-132. Like blokes, board size is directly related to height, weight, ability and windspeed, although as a chick I’m prepared to trade a bit of robustness for a slightly lighter weight. If she’s learning it’s all about getting going easily /stability so maybe go slightly larger length with good width and don’t over do the rocker. After that, it’s all about the graphics haha

!
Good luck – my board of choice atm is the LF aura and there’s heaps of other good stuff on the market.