Zipper tape is easy to cut and sew, the teeth are metal-look but are actually nylon. These sets are #5 for bag making (though I’ve used them for garments too; the wider tape makes them easy to sew). You will need to put the pulls on after you cut your zipper to the desired length. Each pack is 3 yards with 9 easy grip pulls.

Color Stripes/Gunmetal Zip Pack SHH ZIP5EACOLOR Sew Hungry Hippie