This is a large zipper pull, including the pull-tabs and slider. I made it to replace a metal zipper that had corroded on my boat. I'm not sure what size it is, but it is on the large side (8.6 mm at the outer edge of the closed zipper). I could not find a replacement at the local fabric store or at a boat canvas shop.

This is made of ABS using Cura with advanced settings using fine parameters. Print it as-is with the small-end down and pull-tabs pointing up. The is little support necessary (use the setting for support only in direct contact table). Use 100% infill to make it strong enough. After printing, use an Exacto Knife to cut loose the pull-tabs on either side of the slider.