for zig it's 1.8 kB on x86_64-linux with minimal fiddling. i386-windows comes out to 2.5kB.

    $ cat hello.zig
    const std = @import("std");
    pub fn main() void {
          std.io.getStdOut().writeAll("Hello, World!\n") catch {};
    }
    $ zig build-exe hello.zig --strip -OReleaseSmall
    $ zig build-exe hello.zig --strip -OReleaseSmall -target i386-windows
    $ ldd hello
     not a dynamic executable
    $ strip hello
    $ ./hello
    Hello, World!
    $ wine hello.exe
    Hello, World!
    $ ls -hl hello hello.exe
    -rwxr-xr-x 1 andy users 1.8K Mar 10 21:15 hello
    -rwxr-xr-x 1 andy users 2.5K Mar 10 21:15 hello.exe

No min-sized-zig github repository needed.