Welcome to Gaia! ::

I have that same body shape and I think the calf is a great place to get them, I have nine stars on my right one, Its great spot because if you gain or loose weight it won't be destroyed by srteatch marks or get miss-shapend... I highky doubt thats a word but I don't know how else to explain it...

it depends on that tattoo. because the amount of detail and the size of it will automatically tell you where you cant put it.

if she wants to go more descrete. the shoulder blades, upper arms, calf/shin, lower back, behind the ears seem like the better places because they dont change as much as you gain or lose weight. on top of that, if she works (or wants to work) in a more professional setting, alot of them still frown on visible tattoos.

if she doesnt care about what people think, the wrist, forearm, foot, back of the neck, chest peices are more options to consider.

be wary though that the closer to bone you are (the less muscle and fat there are in the area) the more likely it will hurt.
ive heard that the worst spot to do it is on the ribcages and stomach. i didnt feel a thing at all on my arm (and its also all up to personal pain tolerance levels.)

background check and listen to your artist as well. dont just pick one out of the line up because chances are you might not like it. on top of that, certain artists have stronger fortes than others (dont go to a portrait artist for a nautical tattoo.)

if you have you own design, be open to suggestions. because now its both of yours project (he doesnt want shoddy work out there and you dont want a shoddy tattoo). most tattoo artists are pretty nice guys and will be honest with you when they say something wont work the way you want it, dont be bull headed.

i had other things to say but i forgot haha.
in fact im thinking of getting my next tattoo done soon hopefully. either two behind the ears (if it doesnt look too gay/stupid haha) or an arm or chest peice.

Mines on my shoulderblade