How long until I can let my fry out in with the other fish?

she is a perfect size and a good tank to let her in to

Well.... how big is the tank you are hoping to release her into? What type and size are your other fish? Hard to answer a question with such little information provided. Typically if you are just stocking mollies in your tank and want to release fry, they can be released as soon as you are sure that they will not fit in the larger mollies mouths. I would wait until the fry is at least two times the size of the mollies mouth, as some fish will try to eat fry, and then get them stuck in their mouths, risking the lives of both fish. More info please and I can give you a better response

i let my guppy babies out after 2 months they are small still but as long as they are two big to be eaten they will be fine. my babies were only picked on for the first 5 minutes after that no one cared and they've been ignored ever since

Try to wait till she is bigger