20 Black NFC Tags - 20 NTAG213 Stickers by Tagstand, Compatible with all NFC-capable phones 20 Black NFC stickers with the snazzy Tagstand logo 35mm x 35mm Type 2 NFC tags All use the NTAG213 chip, with 144 bytes of available user memory. Uses: The Tagstand Trigger app works great with these tags. The app allows you to program tags to carry out specific actions on your phone with nothing more than a simple tap.