diff --git a/a3-1/sizes.c b/a3-1/sizes.c
new file mode 100644
index 0000000..01c97b5
--- /dev/null
+++ b/a3-1/sizes.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+
+int main(void) {
+    int i;
+    long int li;
+    short int si;
+
+    float f;
+
+    double d;
+    long double ld;
+
+    printf("int: %ld\n", sizeof(i));
+    printf("long: %ld\n", sizeof(li));
+    printf("short: %ld\n", sizeof(si));
+    printf("\n");
+    printf("float: %ld\n", sizeof(f));
+    printf("\n");
+    printf("double: %ld\n", sizeof(d));
+    printf("long: %ld\n", sizeof(ld));
+
+    return 0;
+}