diff --git a/include/cglm/aabb2d.h b/include/cglm/aabb2d.h
index ad9bbd7..6a133ff 100644
--- a/include/cglm/aabb2d.h
+++ b/include/cglm/aabb2d.h
@@ -169,9 +169,10 @@ glm_aabb2d_diagonal(vec2 aabb[2]) {
 }
 
 /*!
- * @brief distance between of min and max
+ * @brief size of aabb
  *
  * @param[in]  aabb bounding aabb
+ * @param[out]  dest size
  */
 CGLM_INLINE
 void
diff --git a/include/cglm/call/aabb2d.h b/include/cglm/call/aabb2d.h
index 6eace32..fc8ddf3 100644
--- a/include/cglm/call/aabb2d.h
+++ b/include/cglm/call/aabb2d.h
@@ -50,7 +50,11 @@ glmc_aabb2d_isvalid(vec2 aabb[2]);
 
 CGLM_EXPORT
 float
-glmc_aabb2d_size(vec2 aabb[2]);
+glmc_aabb2d_diagonal(vec2 aabb[2]);
+
+CGLM_EXPORT
+void
+glmc_aabb2d_size(vec2 aabb[2], vec2 dest);
 
 CGLM_EXPORT
 float
diff --git a/src/aabb2d.c b/src/aabb2d.c
index 80a3ee0..cc651b4 100644
--- a/src/aabb2d.c
+++ b/src/aabb2d.c
@@ -55,8 +55,14 @@ glmc_aabb2d_isvalid(vec2 aabb[2]) {
 
 CGLM_EXPORT
 float
-glmc_aabb2d_size(vec2 aabb[2]) {
-  return glm_aabb2d_size(aabb);
+glmc_aabb2d_diagonal(vec2 aabb[2]) {
+  return glm_aabb2d_diagonal(aabb);
+}
+
+CGLM_EXPORT
+void
+glmc_aabb2d_size(vec2 aabb[2], vec2 dest) {
+  return glm_aabb2d_size(aabb, dest);
 }
 
 CGLM_EXPORT