Great advices and lovely examples in this thread.
I like very much this low volume quilt from Mias Landliv blog (I saw her name in other thread and it reminded me about this beauty):
https://es.pinterest.com/pin/33495590956085493/
https://es.pinterest.com/pin/251638697903015808/
It's a very simple design, it's soft and charming... and I love-love-love the crochet border!
If she preferes something modern, maybe she likes this
extreme low volume quilt (in fact, it's a
no volume quilt) from Molli Sparkles:
https://huntersdesignstudio.files.wo...al_free_20.jpg
Good luck with the search