diff --git a/less/forms.less b/less/forms.less
index 18d3efb547..a8847be2b1 100644
--- a/less/forms.less
+++ b/less/forms.less
@@ -210,11 +210,11 @@ input[type="number"] {
 
 // Form control sizing
 .input-sm {
-  .input-size(@input-height-large; @padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @border-radius-large);
+  .input-size(@input-height-small; @padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @border-radius-small);
 }
 
 .input-lg {
-  .input-size(@input-height-small; @padding-small-vertical; @padding-small-horizontal; @font-size-small; @line-height-small; @border-radius-small);
+  .input-size(@input-height-large; @padding-large-vertical; @padding-large-horizontal; @font-size-large; @line-height-large; @border-radius-large);
 }