Hello,
If you need help determining the slider you need, do not hesitate to send photos of the zipper to be repaired by email to:
[email protected]
You can proceed with an exchange of slider, the 3B is a very small and therefore uncommon reference, you probably need the size above. Do not hesitate to contact Zlideon's customer service who will provide you with a solution very quickly.
Regarding the size of the zipper, it is the teeth that count, we measure the width of the teeth to determine the slider to choose. If the teeth no longer close, you need to send photos by email or look behind your original slider as there is usually a number engraved there that corresponds to a standard size.
Cordially.