Dora & Liz womens Women Multifunctional Bag women purse handbag

How waterproof is it? Is it just protect your stuff from brief rain waterproof of if I drop it in the lake my stuff will be dry waterproof?

I'm seeing different dimensions given. What are the actual dimensions of the bag?

Can this be used as your "personal item" on a plane, or is it too large?

Can this bag stand up on it's own or is it "floppy"?