She's got huge paws. Collie/lab would be my first guess, but one of the terriers or shepherd is possible. I'm going to guess she will be AT LEAST 35 lbs, and likely more, 55-65, but potentially a bit larger than that. I'd adopt her to someone who likes surprises!
Edit: Ah, I just realized you're keeping her . . .I hope YOU like surprises!
And she's just DARLING!