kizmos 5216961 Multipurpose Plastic Bag Clips, set of 6, Multicolored

What is the length of the clips? The description states 1.5 inches, but that is really small.

Are these strong and wide enough when open to clamp down securely on large bags such as 20 pound pet food bags?

Does this product come with the exact colors shown? I'm specifically looking for rainbow colors but reviews are showing different colors.

are there teeth or softer pads on the inside of the clip . how wide is the little ball shape on the end- diameter?