The NAND Flash memory array comprises of the blocks of pages. Each block usually includes 16, 32, 64 and more pages. Conditionally, the NAND Flash devices can be divided in two groups: the "small page" and "large page" devices. The "small page" size is 512 bytes for the 8-bit devices and 256 bytes for the 16-bit devices; the "small page" NAND Flash memory devices' capacity varies from 128K to 512K bits. The picture below shows the "small page" NAND Flash memory architecture of the STMicroelectronics™ NAND devices.
The "large page" size is 2048 bytes for the 8-bit devices and 1024 bytes for the 16-bit devices; the "large page" NAND Flash memory devices' capacity varies from 256K to 32G bit capacity and higher. The picture below shows the "large page" NAND Flash memory architecture of the STMicroelectronics™ NAND devices. The latest "large page" NAND Flash devices have as large as 4096 byte page size.
Read also about bad blocks in the NAND Flash memory devices.