These are reproduction Citroen Xsara VTS B-pillar door side adhesive vinyls in a proper exterior textured material. Existing ones are prone to shrinking, cracking, and generally looking a mess within no time.
Simply remove your others, clean the surface up and bring them back to life with our replacements.
They may fit other models but you would need to do your own investigating.
This includes both stickers to do both doors, and are a direct replacement for original part nos. 8665S8 (left) / 8665S9 (right)