One keychain-friendly NFC tag, perfect for carrying around.
MIFARE Classic 1K(S50) 13.56MHz RFID Badge Key Fob - ABC RFID
RFID, Card Tags and Readers
NFC Key Fobs - Tunnistekauppa
This is a blank 13.56MHz RFID/NFC Sticker with an NTAG213 chip - often used for train/bus passes, information sharing, and contactless payment, but
13.56MHz RFID/NFC Sticker - NTAG213 Tag
100pcs Ntag213 NFC Tags keychain 13.56MHz ISO14443A RFID Keyfobs Ntag 213 for all NFC enabled phones - AliExpress
Differences & Selection of Ntag213, Ntag215 and Ntag216?
RFID/NFC Tag Blue Fob (NTAG213 Chip, 13.56MHz) - Pack of 5
25mm NFC 213 Chip Coin Money Amex Credit Card With 144bytes For TagMo Forum Type2, 13.56mHz Access Attendance Amex Credit Card For All NFC Phones From Aitech88, $0.26
China 13.56mhz ABS Nfc213 Nfc Keyfob/Nfc Key Tag/Nfc Keychain Manufacturers and Suppliers - Lex
20 Pack Mifare Classic 1k NFC Tag RFID Sticker 13.56mhz RFID NFC Tags Classic 1k ISO14443A RFID Smart 25mm Adhesive Smart NFC Tags by Timeskey NFC : Industrial & Scientific