The AirTag is coin-sized, measuring 1.26 inches in diameter and with a height of 0.31 inches. The Tile Pro is bigger at 42mm (1.65 inches) tall and wide, but it's slightly slimmer at 6.5mm (0.26 inches). The Chipolo One Spot is 1.49 inches in diameter and 0.25 inches thick, making it slightly larger than the AirTag, but marginally thinner.

Unlike AirTag, Tile products come in varied sizes and have different ranges. The cheapest option is the $25 Tile Mate, a small keychain square with a 250-foot Bluetooth range and an optional adhesive. In terms of size, the Tile Sticker is nearly identical to Apple's AirTag and has the same 250-foot range as the Tile Mate.

The smallest, known as the Tile Sticker, comes with an adhesive to stick anywhere you’d like, and it looks like a small black circle (much like the AirTag’s white disc). The next product up is the Tile Slim, which is a bit larger than the Sticker, and resembles a small credit card that’s ideal for putting in a wallet.

There are several sizes and shapes. I bought a $25 Tile Sticker that's about the size of a quarter, a hair smaller than an AirTag. You can stick it to anything. AirTag requires a keychain or a separate holder. Speaking of sizes, Tile sells a $29.99 "Slim" model that looks like a credit card and slips into a wallet.