you don't see this as a form factor often, but if you look at your NVMe M.2. slot on your motherboard, you'll notice positions for 4, 8, and 10cm. This one would be the smallest one, 4cm.

Aimed as drop-in solution as well as industrial, this NVMe M.2 SSD has proper quality listed as 3D TLC NAND flash with 3,000 P/E cycles. The form factor is that compact M.2 2242, which is ideal for small embedded devices such as IoT and edge computers. The interface is PCI-Express3.0 (x2), and the transfer speed is sequential read up to 1,600MB / sec and write up to 1,300MB / sec. The encryption function supports AES 256bit and TCG Opan, and MTBF is at least 2 million hours.

The capacity lineup is 64GB, 128GB, 256GB, 512GB. The main body size is 22 mm wide, 42 mm long, and 3.5 mm thick.