I've never ridden one, but Public Bikes has the look of what you're after. I like that style as well, and my wife was considering one for a while.
https://publicbikes.com/collections/womens-bikes
Flying Pigeon was another on the cheaper end. Not sure if you can still get them in the US.
https://en.wikipedia.org/wiki/Flying_Pigeon
And like folks have said, folding bikes are generally one-size fits all, with long seatposts to adjust to a variety of sizes. My Downtube was not terribly expensive and also has a telescoping stem so that both the seat height and handlebars are adjustable.
https://www.downtube.com/