The value provided for block size options is interpreted as a decimal (base 10) integer number of bytes. It can also contain suffixes to indicate that the block size is an integer number of larger units than bytes. POSIX only specifies the suffixes (blocks) for 512 and (kibibytes) for 1024. Implementation differ on the additional suffixes they support: (Free) BSD uses lowercase (mebibytes), (gibibytes), and so on for tebibytes, exbibytes, pebibytes, zebibytes, and yobibytes, while GNU uses and for the same units, with , , and used for their SI unit counterparts (kilobytes). For example, for GNU , indicates a blocksize of 16 mebibytes (16777216 bytes) and specifies 3000 bytes.