diff --git a/src/cmd/fsize.c b/src/cmd/fsize.c
new file mode 100644
index 0000000..e8d7307
--- /dev/null
+++ b/src/cmd/fsize.c
@@ -0,0 +1,32 @@
+#include <u.h>
+#include <libc.h>
+
+void
+usage(void)
+{
+	fprint(2, "usage: fsize file...\n");
+	exits("usage");
+}
+
+void
+main(int argc, char **argv)
+{
+	int i;
+	Dir *d;
+
+	ARGBEGIN{
+	default:
+		usage();
+	}ARGEND
+	if(argc == 0)
+		usage();
+
+	for(i=0; i<argc; i++){
+		if((d = dirstat(argv[i])) == nil)
+			fprint(2, "dirstat %s: %r", argv[i]);
+		else{
+			print("%s: %lld\n", argv[i], d->length);
+			free(d);
+		}
+	}
+}