If tickling a woman, I would have to go with the flow here and say smaller, petite feet. They're easier to wrangle in and keep a hold of . With a male lee, I can't go past bigger feet! Nothing beats a big, ticklish, vulnerable pair of male feet!
As long as they are human...and female, whats the difference.
I'm gonna go with big female feet on this one...i don't know it's just something about long slender feet with the long toes to go with it