diff --git a/FAQ.md b/FAQ.md
index 854bce6..1ae1603 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -334,6 +334,8 @@ Reusable         | no<sup>(3)</sup>   | no<sup>(3)</sup>
 
 <sup>(3)</sup> there is a workaround (see issues [#72](https://github.com/bblanchon/ArduinoJson/issues/72) and [#115](https://github.com/bblanchon/ArduinoJson/issues/115)) for those who are looking for troubles.
 
+As a general rule, if your `StaticJsonBuffer` is bigger than 2K, then it may be a good time to switch to a `DynamicJsonBuffer`.
+
 ### I found a memory leak in the library!
 
 This is very unlikely. You're probably using the library incorrectly.