diff --git a/lib/nib/index.styl b/lib/nib/index.styl
index 411e5067..40355fe2 100644
--- a/lib/nib/index.styl
+++ b/lib/nib/index.styl
@@ -10,3 +10,4 @@
 @import 'reset'
 @import 'text'
 @import 'vendor'
+@import 'size'
diff --git a/lib/nib/size.styl b/lib/nib/size.styl
new file mode 100644
index 00000000..fd3aaf62
--- /dev/null
+++ b/lib/nib/size.styl
@@ -0,0 +1,28 @@
+/*
+ * Size utility.
+ * 
+ * Synopsis:
+ * 
+ *   size: <width> <height> | <width & height>
+ * 
+ * Examples:
+ * 
+ *     size: 100% 30px
+ *       yields:
+ *         width: 100%
+ *         height: 30px
+ * 
+ *     size: 5px
+ *       yields:
+ *         width: 5px
+ *         height: 5px
+ * 
+ */
+
+size()
+  if length(arguments) == 1
+    width: arguments[0]
+    height: arguments[0]
+  else
+    width: arguments[0]
+    height: arguments[1]