For My Doll wigs---do they run true to size?

Hi! I'm needing to buy a For My Doll wig for a Dollfie Dream, and wonder if I should buy the 8-9 or the 9.5 -10 size?
:hugs:
~Setsuna
:hugs:
~Setsuna
Where no dollieh is left behind.
https://w.dolliehsanctuary.com/sanctuary/
https://w.dolliehsanctuary.com/sanctuary/viewtopic.php?f=41&t=6729