diff --git a/headers/alloc.h b/headers/alloc.h
index 2402b83..fac395a 100644
--- a/headers/alloc.h
+++ b/headers/alloc.h
@@ -89,3 +89,5 @@ void vfree(void *ptr);
 void *vrealloc(void *ptr, size_t size);
 void show_kalloc_mem(void);
 void show_valloc_mem(void);
+size_t ksize(void* virt_addr);
+size_t vsize(void* virt_addr);
\ No newline at end of file
diff --git a/src/kernel.c b/src/kernel.c
index 5e0f8c3..618f008 100644
--- a/src/kernel.c
+++ b/src/kernel.c
@@ -33,6 +33,7 @@ void kernel_main(void)
 	kprintf(KERN_NOTICE "KERN_NOTICE\n");
 	kprintf(KERN_INFO "KERN_INFO\n");
 	kprintf(KERN_DEBUG "KERN_DEBUG\n");
-	vmalloc(10);
+	void *ptr = vmalloc(100);
+	kprintf("%d\n", ksize(ptr));
 	shell_init();
 }
diff --git a/src/memory/phys/ksize.c b/src/memory/phys/ksize.c
new file mode 100644
index 0000000..200ab61
--- /dev/null
+++ b/src/memory/phys/ksize.c
@@ -0,0 +1,8 @@
+#include "alloc.h"
+
+size_t ksize(void *ptr)
+{
+	Block *meta_data = (Block *)((size_t)ptr - sizeof(Block));
+
+	return meta_data->sub_size;
+}
\ No newline at end of file
diff --git a/src/memory/virt/vsize.c b/src/memory/virt/vsize.c
new file mode 100644
index 0000000..d2bfb13
--- /dev/null
+++ b/src/memory/virt/vsize.c
@@ -0,0 +1,8 @@
+#include "alloc.h"
+
+size_t vsize(void *ptr)
+{
+	Block *meta_data = (Block *)((size_t)ptr - sizeof(Block));
+
+	return meta_data->sub_size;
+}
\ No newline at end of file