My GF recently told me that she wants to try real diapers on our next long road trip. She absolutely loves Goodnights but agrees with me that they probably aren't up to the task as we have a new car and don't want to stain the seats. After looking around a bit we've decided on Bambino diapers. The problem is that I can't find any reliable sizing info. Most sites just list S/M/L, and that doesn't really let me know what I'm getting. Small or medium can be totally different between the various brands. I've screwd this up in the past and want to get it right before I buy a relatively expensive product. Plus, if they don't fit just right it'll sort of defeat the purpose anyway.
She is about 5'4" and weighs around 115lbs. Her waist is approx. 30"(my best guess). Her hips are between 33" and 35". I can safely eliminate the large size, but can't quite tell if small or medium would be best. If anyone who has experience with Bambino sizes could help me narrow it down, I would be most grateful.