[header] How to sew clear vinyl [title] Pick a sharp size 14 , 16, or 18 needle. [step] Since some clear vinyls are thick, use a very sharp needle that can cut through the material. Use a leather needle size 14 or a universal needle in 16 or 18. 
These won't bend when you sew through the vinyl. [substeps] If you can't find needles for leather, you can also choose needles made for denim.