diff --git a/concepts.mdx b/concepts.mdx
index fbd9764..688747a 100644
--- a/concepts.mdx
+++ b/concepts.mdx
@@ -54,10 +54,18 @@ Variants are options for flags. For example, if you have a flag `colorscheme`
that determines which main colors your users see when they login to your
application, then possible variants could include `dark`, `light` or `auto`.
-
- Variants can also have JSON attachments. This allows you to store additional
- data about a variant that can be used in your application at runtime.
-
+#### Variant Attachments
+
+Variants can also have JSON attachments. This allows you to store additional
+data about a variant that can be used in your application at runtime.
+
+
+
+Variant attachments are not used for evaluation, they are only used for runtime configuration.
+
+The attachment size is limited to **1MB**.
+
+
