diff --git a/Rsconscript b/Rsconscript
index 1a9aba8..14f00c3 100644
--- a/Rsconscript
+++ b/Rsconscript
@@ -80,6 +80,8 @@ hulk_env = env "hulk", use: %w[ldc2 x86_64-elf-gcc] do |env|
   env["OBJCOPY"] = "x86_64-elf-objcopy"
   env.Program("^/hulk.elf", "${sources}")
   env.depends("^/hulk.elf", "src/hulk/hulk.ld")
+  env["SIZE"] = "x86_64-elf-size"
+  env.Size("^/hulk.size", "^/hulk.elf")
   env.Disassemble("^/hulk.txt", "^/hulk.elf")
   env.Command("^/hulk.bin", "^/hulk.elf",
               "CMD" => %W[${OBJCOPY} -O binary ${_SOURCES} ${_TARGET}],
@@ -102,6 +104,8 @@ hello_env = env "hello", use: %w[ldc2 x86_64-w64-mingw32-gcc] do |env|
   env["LDCMD"] = %w[${LD} -o ${_TARGET} ${LDFLAGS} ${_SOURCES} ${LIBDIRPREFIX}${LIBPATH} ${LIBLINKPREFIX}${LIBS}]
   env["OBJDUMP"] = "x86_64-w64-mingw32-objdump"
   env.Program("^/BOOTX64.EFI", "${sources}")
+  env["SIZE"] = "x86_64-w64-mingw32-size"
+  env.Size("^/BOOTX64.size", "^/BOOTX64.EFI")
   env.Disassemble("^/BOOTX64.txt", "^/BOOTX64.EFI")
   env.Image("^/hos.img", "^/BOOTX64.EFI")
 end