Function kib 

pub const fn kib(n: usize) -> usize

Multiply by 1024 to express a byte count in kibibytes (KiB).

Returns usize; use kib_u64 when you need a u64.

use rama_utils::octets::kib;
const LIMIT: usize = kib(8);
assert_eq!(LIMIT, 8 * 1024);