My favorite AirTag wallet alternative is lightweight, super thin, and surprisingly cheap
A thin, rechargeable SmartCard with MagSafe compatibility, luggage-hole and IPX7 durability provides a wallet-friendly, less wasteful AirTag alternative.
Apple doesn't make an AirTag that fits in your wallet - I recommend this instead
A thin, 2 mm rechargeable SmartCard locator replaces bulky AirTags, fits wallets comfortably, offers wireless (MagSafe) charging, IPX7 water resistance, and five-month battery life.