Editorial review: add interpolate-size and calc-size()

files/en-us/glossary/intrinsic_size/index.md

@@ -67,3 +67,4 @@ The opposite of _intrinsic size_ is **_extrinsic size_**, which is based on the
 - CSS {{cssxref("aspect-ratio")}} property
 - [CSS box sizing](/en-US/docs/Web/CSS/CSS_box_sizing) module
 - [CSS sizing specification: intrinsic sizes](https://www.w3.org/TR/css-sizing-3/#intrinsic-sizes)
+- The {{cssxref("interpolate-size")}} property and {{cssxref("calc-size()")}} function for enabling transitions to and from [intrinsic size values](/en-US/docs/Glossary/Intrinsic_Size).

files/en-us/web/css/block-size/index.md

@@ -88,3 +88,4 @@ The `block-size` property takes the same values as the {{cssxref("width")}} and
 
 - The mapped physical properties: {{cssxref("width")}} and {{cssxref("height")}}
 - {{cssxref("writing-mode")}}
+- The {{cssxref("interpolate-size")}} property and {{cssxref("calc-size()")}} function for enabling animations to and from [intrinsic](/en-US/docs/Glossary/Intrinsic_Size) `block-size` values such as {{cssxref("auto")}} and {{cssxref("fit-content")}}.