All bikers in France, whether
residents or visitors, to wear a helmet with reflective stickers on, and this one has not been scrapped. Bikers caught wearing a helmet without stickers may face a
135 euros fine payable on the spot and
3 points taken off their licence. The police have recently been enforcing this rule quite severely in Paris and other locations throughout France.
All helmets must have
four reflective stickers: one on the front, one at the rear and one on each side. The surface of each sticker must be 18 cm2 and, within each sticker, you must be able to draw a 40 mm diameter circle, or a 12.50 cm2 rectangle with a minimum of 20 mm length, as shown on the below picture.
The vehicle whose driver motor runs without wearing a helmet approved type or without the helmet is attached can be immobilized !!!
You can have a look on the complete official text here :
http://www.ffmc.asso.fr/article2563.html . Google can help if translation is needed.
You can opt for this one:
Be careful: one on the front, one each side, and one on the rear