Handbag zippers are nylon-coil 30" double slide zippers from byAnnie that are perfect for bags and carriers.
The #4.5 size is just the right size, Dress and skirt zippers are too small for most bag projects. This size also means you have generously sized zipper pulls and also wide zipper tape for easy installation.
The zippers are soft and flexible, making them easy to sew through. (No more broken needles!)
The double slide lets you open your bag from either end and you can trim the zipper to your desired length.