All official Sigma Beauty brushes will include the following:
Laser engraved logo
Patent No. D718060 or ‘Patent Pending’ depending on brush manufacture date
Manufacturer serial numbers may be stamped in ferrules depending on manufacture date, this was recently implemented to further ensure authenticity
Sigma is able to guarantee authentic Sigma products when purchasing from our direct website at SigmaBeauty.com or from an authorized retailer. You can view a complete list of our authorized retailers here.