diff --git a/src/base/base_core.c b/src/base/base_core.c
index 97515ce6..79655432 100644
--- a/src/base/base_core.c
+++ b/src/base/base_core.c
@@ -407,6 +407,12 @@ bit_size_from_arch(Arch arch)
   return arch_bitsize;
 }
 
+internal U64
+byte_size_from_arch(Arch arch)
+{
+  return bit_size_from_arch(arch) / 8;
+}
+
 internal U64
 max_instruction_size_from_arch(Arch arch)
 {
diff --git a/src/base/base_core.h b/src/base/base_core.h
index e9a166f2..bd67f5c6 100644
--- a/src/base/base_core.h
+++ b/src/base/base_core.h
@@ -959,6 +959,7 @@ internal B32 txt_rng_contains(TxtRng r, TxtPt pt);
 //~ rjf: Toolchain/Environment Enum Functions
 
 internal U64 bit_size_from_arch(Arch arch);
+internal U64 byte_size_from_arch(Arch arch);
 internal U64 max_instruction_size_from_arch(Arch arch);
 
 ////////////////////////////////