These are official StockX authentication tags used for verifying the authenticity of sneakers, streetwear, and collectible items sold on the StockX marketplace. The set includes two types: rectangular hang tags printed with 'STOCKX', 'Always Verified Authentic Since 2016' in white on dark green cardstock; and circular plastic tags—some featuring a bold white 'X' logo, others with a holographic silver 'Verified Authentic' seal containing microtext and QR-like patterns, all threaded with black cord for attachment to products. These tags serve as tamper-evident security features: removal voids authenticity claims, as explicitly stated on the circular tags ('Please inspect item. All claims null and void if tag is removed'). Designed for resale verification, they ensure buyer confidence in secondhand luxury and sneaker markets. Ideal for authenticated resellers, collectors, and consignors preparing items for StockX drop-off or verification. Not wearable apparel or accessories themselves, but essential ancillary components in the modern sneaker/streetwear authentication ecosystem.