diff --git a/2-ui/1-document/09-size-and-scroll/article.md b/2-ui/1-document/09-size-and-scroll/article.md
index 102f9c585c..024e9a4d9c 100644
--- a/2-ui/1-document/09-size-and-scroll/article.md
+++ b/2-ui/1-document/09-size-and-scroll/article.md
@@ -268,7 +268,7 @@ Elements have the following geometry properties:
 - `offsetParent` -- is the nearest positioned ancestor or `td`, `th`, `table`, `body`.
 - `offsetLeft/offsetTop` -- coordinates relative to the upper-left edge of `offsetParent`.
 - `offsetWidth/offsetHeight` -- "outer" width/height of an element including borders.
-- `clientLeft/clientTop` -- the distance from the upper-left outer corner the inner corner. For left-to-right OS they are always the widths of left/top borders. For right-to-left OS the vertical scrollbar is on the left so `clientLeft` includes its width too.
+- `clientLeft/clientTop` -- the distances from the upper-left outer corner to the upper-left inner (content + padding) corner. For left-to-right OS they are always the widths of left/top borders. For right-to-left OS the vertical scrollbar is on the left so `clientLeft` includes its width too.
 - `clientWidth/clientHeight` -- the width/height of the content including paddings, but without the scrollbar.
 - `scrollWidth/scrollHeight` -- the width/height of the content, just like `clientWidth/clientHeight`, but also include scrolled-out, invisible part of the element.
 - `scrollLeft/scrollTop` -- width/height of the scrolled out upper part of the element, starting from its upper-left corner.