I too have tiny little hands. #(My daughter's hands were larger than mine when she was about ten years old!) #
I have a PacRim mandolin with a 1-1/8" nut, a rounded back of the neck, and small frets that I do okay on. #My Silver Angel mandolin has a radiused fretboard, larger frets, and a 1-3/16" nut - as well as a 'V-style' carved neck. #I do much better with that 'wider' setup.
As many will tell you, 'test-drive' as many different instruments as you can. #Most of the luthiers (if you have one custom-made) will customize the crafting of the mandolin to your specifications. #I can still play any width neck, rounded or V, but I definitely feel better playing the setup I have.
It's all personal preference - you'll just have to determine 'what' it is that fits you best.
Good luck! #
"The more I learn, the more I realize how ignorant I truly am..."