better spacing

scss/_variables.scss

@@ -158,10 +158,12 @@ $spacers: (
   1: $spacer * .25,
   2: $spacer * .5,
   3: $spacer,
-  4: $spacer * 1.5,
-  5: $spacer * 2.5,
-  6: $spacer * 4,
-  7: $spacer * 6
+  4: $spacer * 1.25,
+  5: $spacer * 1.5,
+  6: $spacer * 3,
+  7: $spacer * 6,
+  8: $spacer * 9,
+  9: $spacer * 12,
 ) !default;
 
 $size-spacers: (