I agree they are all too big visually, but the important question is whether they are too big functionally. That is, will they stay on your face in day-to-day life? Some acetate frames have a little stretch in them, so they ought to be comfortably snug to start. If the seller tries to tell you they can “shape” a pair of too-large frames to fit, I’d gently encourage you to take your business elsewhere.
If you have worn glasses before, you already know this and don’t need me repeating it, but just in case……
The size of the frames is printed on the inside of the right arm. If you already own glasses that fit you well you can choose new frames with a similar size. If you don’t know your size, ask to see a selection that has a smaller lens width (the first of the three numbers) than the ones you tried here and see if they fit your face more securely. It doesn’t matter for these purposes if you like the shape or color, just try some smaller frames to judge how they feel on your face and behind the ears.
As for shape and color, I lean toward the purple ones and the multi-color on the bottom ones. But all are nice IMO.
Good luck making your final decision.