This elastic wristband is available in 3 diameters : 145, 165 and 185 mm. It is 20 mm wide.
 
It has a RFID chip inside, whose technology you can chose : ICODE SLI-S, Mifare Ultraligt EV1, Mifare Ultralight, NTAG216, Mifare 1K S50, FM1108, Ntag203, Ntag213, Alien H3(9613), Alien H3(9629), EM4200, TK4100
 
These elastic wristbands with inner RFID tag can be personalised on both sides with logo or text.
Print : you can chose any colour and print you wish for.