Wearable NFC
NFC Rings
NTAG213 Wearable Smart Rings
Quick answer
A passive NTAG213 ring: no battery, no charging, a tap gesture. Sealed in water-resistant epoxy, sized to fit, and ready for door access, gym check-in, smart business cards and tap-to-review programs. Factory-direct with logo engraving from MOQ 50.
- Passive and maintenance-free: the ring carries an NTAG213 NFC chip - no battery, no charging, a tap gesture. Sealed in water-resistant epoxy for daily wear.
- NTAG 213 inside: 144 bytes of usable NDEF memory (180 bytes total EEPROM), NFC Forum Type 2, fully phone-compatible - verified against our chip registry, not marketing copy.
- Sized and branded for your program: US sizes 7-13, laser logo engraving, MOQ 500 with written quotes and lead times.
At a glance
Use these short answers to decide whether this page matches the project before moving into the detail.
What it is
A passive wearable: an NTAG213 chip and antenna sealed inside a ceramic-epoxy ring body. No battery, nothing to charge, nothing to sync - it behaves exactly like an NFC...
The chip inside
NXP NTAG 213: 144 bytes user NDEF memory (180 bytes total EEPROM), ISO/IEC 14443-A, NFC Forum Type 2 Tag. NDEF formatting out of the factory for URL, vCard or app-launch...
Next step
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- Water-resistant epoxy seal for handwashing, rain and daily wear; not rated for diving - if your program needs that, ask and we will spec it explicitly.
- Ring sizes US 7-13; logo engraving or custom NDEF payload pre-written at the factory.
Why programs choose a ring over a card or sticker
A ring is the only NFC form factor your user physically cannot forget. That single property decides most deployments:
- Gyms and studios: check-in is a fist-bump to a reader - no card, no app, no queue at the desk.
- Events and venues: VIP identification that stays on the guest through the whole event.
- Smart business card and tap-to-review: the ring carries your vCard or Google review link - the same playbook as our NFC cards, worn instead of carried.
- Corporate access: badge replacement for staff who never wear lanyards - subject to your reader platform accepting NTAG213.
NTAG 213 - what the ring's chip actually delivers
| Property | NTAG 213 (verified spec) |
|---|---|
| User NDEF memory | 144 bytes - enough for a URL, contact card or command payload |
| Total EEPROM | 180 bytes (includes configuration, UID and lock bytes) |
| Air interface | ISO/IEC 14443-A, NFC Forum Type 2 Tag |
| Frequency | 13.56 MHz, passive (no battery) |
| Crypto | None - NTAG213 is not a secure-element chip; for high-security access see our DESFire or NTAG 424 DNA cards |
Honest fit check
A ring is a convenience wearable carrying the same data as a sticker - it does not add security. If your program needs authenticated taps or anti-cloning, NTAG 424 DNA (with cryptographic per-tap responses) is the right platform, and we will tell you when the ring is the wrong answer: swimming programs, heavy machinery environments, or any site demanding ISO 14443 reader alignment you cannot test in advance. Send your reader model first; we confirm compatibility before you order.
Ordering - sizes, branding, volume
- Ring size mix (US 7-13) with per-size quantities.
- Branding: logo engraving position, or unbranded for resale.
- Payload: pre-written NDEF (URL / vCard / app deep-link) or blank for your own encoding.
- MOQ 500 per size mix; written quote and lead time confirmed before production.
Useful next pages
Use these linked product, guide and comparison pages to keep the next click specific and practical.
Deep reading
Our buyer's guide to NFC smart rings - what they can and cannot do.
Related wearables
Other form factors in the wearable family.
FAQ
Does an NFC ring work with iPhone and Android?
Yes for reading: NTAG213 is an NFC Forum Type 2 tag, and both Android and iPhone (iPhone XS and newer) read it natively - iPhone background-tap opens the URL or profile payload. For door readers, compatibility depends on your reader's configuration, so send us the reader model before ordering.
Is the ring waterproof?
The epoxy seal is water-resistant for daily life - handwashing, rain, showers. It is not dive-rated. If your use case involves sustained submersion (swimming programs, pools), tell us and we will specify a suitable construction explicitly rather than overstate this one.
How much data fits on the ring?
144 bytes of usable NDEF memory - a URL, a vCard, a review-link payload or a short command. It is not a data vault; it is a trigger.
What is the MOQ and can we get our logo engraved?
MOQ 500 pieces across your size mix. Laser engraving of your logo is available, and we can pre-write the NDEF payload so the rings arrive tap-ready.
Sources & references
Primary standards, OEM datasheets and regulatory documents cited by this article. All URLs were verified on the access date shown below.
- NXP NTAG 213 - verified spec registry (in-repo)
144 B user / 180 B total EEPROM, ISO 14443-A, NFC Forum Type 2
Proud Tek is a Shenzhen-based RFID & NFC manufacturer supplying hotel chains, transit operators, event venues and retail brands worldwide. Every order includes free samples, RF testing and dedicated project support.
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