Different NFC chips have various sizes of storage and various storage options. This affects the total amount of info you’ll be able to store on specific chips nonetheless it also affects the way the chip could be locked.

UltralightNTAG203NTAG210NTAG213NTAG215NTAG216
User Memory
(bytes)
4814448144504888
Max URL
(characters)
4113241132492854
NFC Forum
Compliant
YesYesYesYesYesYes
Scan CounterNoNoNoYesYesYes
Password ProtectionNoNoYesYesYesYes
Serial Number7 bytes7 bytes7 bytes7 bytes7 bytes7 bytes