diff --git a/README.md b/README.md
index 113fa39..ca93cf2 100644
--- a/README.md
+++ b/README.md
@@ -164,7 +164,7 @@ CREATE INDEX ON items USING ivfflat (embedding vector_l2_ops) WITH (lists = 1000
 
 ### Vector Type
 
-Each vector takes `4 * dimensions + 8` bytes of storage. Each element is a float, and all elements must be finite (no `NaN`, `Infinity` or `-Infinity`). Vectors can have up to 1024 dimensions.
+Each vector takes `4 * dimensions + 8` bytes of storage. Each element is a single precision floating-point number (like the `real` type in Postgres), and all elements must be finite (no `NaN`, `Infinity` or `-Infinity`). Vectors can have up to 1024 dimensions.
 
 ### Vector Operators