Hi there! I just ordered my first MG bag during this latest restock and decided to go with the regular Lady. I'm even shorter than you at barely 5' and really quite petite. (For perpsective, the bag in my avatar is obviously the medium YSL cabas - it's a tad bigger on my frame but okay for work, if not for the flashy color.) My favorite bag sizes are among the ones you've mentioned - Celine micro luggage, Givenchy small Antigona in particular - and most of my bags are the smaller sizes. However, I looked at dozens and dozens of photos of the regular vs. mini and did not find the size difference to be significant based off of photos. I did also purchase this bag specifically as a work bag and while I sometimes take my smaller bags with me to work (right now I'm alternating a petite 2Jours! That's tiny for a work bag and I have to carry my notebook and laptop separately all the time), the more space I have, the better. For a "light" bag like this, I don't think the size of the regular would be too overwhelming on a frame like ours. I'll know for sure when I get the bag in a couple of weeks - then I can come back here with my thoughts, if that helps! But I have a good feeling about my pick and know it will be functional for work. But then, if you're going to use your bag more during the weekends, then I think a mini would definitely have to do.