diff --git a/src/scss/cdb-components/forms/textarea.scss b/src/scss/cdb-components/forms/textarea.scss
index e69e455..79b10e4 100644
--- a/src/scss/cdb-components/forms/textarea.scss
+++ b/src/scss/cdb-components/forms/textarea.scss
@@ -21,6 +21,7 @@
   border-radius: $baseSize / 2;
   font-size: $sFontSize-medium;
   line-height: $sLineHeight-medium;
+  box-sizing: border-box;
 
   &:hover {
     border: 1px solid $cHoverLine;