diff --git a/hostnames_allocator/README.md b/hostnames_allocator/README.md
index 5a557d0..eb01d3b 100644
--- a/hostnames_allocator/README.md
+++ b/hostnames_allocator/README.md
@@ -63,6 +63,8 @@ Memory requirements are `O(log(number of ranges))` plus combined length of all h
 
 Constant factors were not considered in this implementation.
 
+Compiled binary size on `x86_64-unknown-linux-musl` target is 506KB.
+
 ## Usage
 
 Nightly Rust is needed (because `btree_cursors` unstable feature is used).