diff --git a/kernel/src/utils/mod.rs b/kernel/src/utils/mod.rs
index af212e3..f0034ba 100644
--- a/kernel/src/utils/mod.rs
+++ b/kernel/src/utils/mod.rs
@@ -1,2 +1,3 @@
 pub mod extern_addr;
 pub mod function_name;
+pub mod size;
diff --git a/kernel/src/utils/size.rs b/kernel/src/utils/size.rs
new file mode 100644
index 0000000..bf01b4c
--- /dev/null
+++ b/kernel/src/utils/size.rs
@@ -0,0 +1,12 @@
+pub const B: usize = 1;
+pub const KB: usize = B * 1000;
+pub const MB: usize = KB * 1000;
+pub const GB: usize = MB * 1000;
+pub const TB: usize = GB * 1000;
+pub const PB: usize = TB * 1000;
+
+pub const KIB: usize = B * 1024;
+pub const MIB: usize = KIB * 1024;
+pub const GIB: usize = MIB * 1024;
+pub const TIB: usize = GIB * 1024;
+pub const PIB: usize = TIB * 1024;