add Vector Optimized info

modules/ROOT/pages/managing-instances/instance-details.adoc

@@ -79,6 +79,52 @@ But if you clone to an existing instance, its vector optimization setting remain
 
 To learn more about how to use vector indexes, see link:https://neo4j.com/docs/cypher-manual/current/indexes/semantic-indexes/vector-indexes/[Cypher Manual -> Vector indexes].
 
+=== Instance sizing guide
+
+The vector optimized configuration is intended to allow an Aura instances' available storage to be completely filled and still provide consistent vector search performance. 
+The table below shows the theoretical maximum GiB of vectors for each instance size, and the equivalent number of 768 dimension float-32 vectors. 
+
+[cols="1,1,2"]
+|===
+|Aura Instance Size |GiB vectors |Million vectors (768 dimensions)  
+
+|4GB
+|2.8 
+|0.9
+
+|8GB
+|5.6 
+|1.8
+
+|16GB
+|11.2 
+|3.6
+
+|32GB
+|22.4 
+|7.3
+
+|64GB
+|44.9 
+|14.6
+
+|128GB
+|89.8 
+|29.2
+
+|256GB
+|179.6 
+|58.4
+
+|512GB
+|359.3 
+|116.9
+
+|=== 
+
+GiB vectors is limited by available storage. 
+As larger stores become available, we can increase the vector capacity for these instances.
+
 // == Import instance
 
 // _Feature coming soon!_