diff --git a/examples/guide-supported-types-examples/bootstrap.js b/examples/guide-supported-types-examples/bootstrap.js
index ddd62bb5..5202a4c2 100644
--- a/examples/guide-supported-types-examples/bootstrap.js
+++ b/examples/guide-supported-types-examples/bootstrap.js
@@ -1,2 +1,10 @@
 import * as imported_types from './imported_types.js';
 import * as exported_types from './exported_types.js';
+import * as str from './str.js';
+import * as string from './string.js';
+import * as char from './char.js';
+import * as bool from './bool.js';
+import * as js_value from './js_value.js';
+import * as boxed_js_value_slice from './boxed_js_value_slice.js';
+import * as pointers from './pointers.js';
+import * as numbers from './numbers.js';
diff --git a/examples/guide-supported-types-examples/numbers.js b/examples/guide-supported-types-examples/numbers.js
new file mode 100644
index 00000000..cc6ee35a
--- /dev/null
+++ b/examples/guide-supported-types-examples/numbers.js
@@ -0,0 +1,22 @@
+import {
+  take_number_by_value,
+  return_number,
+  take_option_number,
+  return_option_number,
+} from './guide_supported_types_examples';
+
+take_number_by_value(42);
+
+let x = return_number();
+console.log(typeof x); // "number"
+
+take_option_number(null);
+take_option_number(undefined);
+take_option_number(13);
+
+let y = return_option_number();
+if (y == null) {
+  // ...
+} else {
+  console.log(typeof y); // "number"
+}
diff --git a/examples/guide-supported-types-examples/src/lib.rs b/examples/guide-supported-types-examples/src/lib.rs
index 933f5215..a1db369c 100755
--- a/examples/guide-supported-types-examples/src/lib.rs
+++ b/examples/guide-supported-types-examples/src/lib.rs
@@ -12,3 +12,4 @@ pub mod bool;
 pub mod js_value;
 pub mod boxed_js_value_slice;
 pub mod pointers;
+pub mod numbers;
diff --git a/examples/guide-supported-types-examples/src/numbers.rs b/examples/guide-supported-types-examples/src/numbers.rs
new file mode 100644
index 00000000..f4fc7e0f
--- /dev/null
+++ b/examples/guide-supported-types-examples/src/numbers.rs
@@ -0,0 +1,17 @@
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+pub fn take_number_by_value(x: u32) {}
+
+#[wasm_bindgen]
+pub fn return_number() -> f64 {
+    42.0
+}
+
+#[wasm_bindgen]
+pub fn take_option_number(x: Option<u8>) {}
+
+#[wasm_bindgen]
+pub fn return_option_number() -> Option<i16> {
+    Some(-300)
+}
diff --git a/guide/src/reference/types.md b/guide/src/reference/types.md
index ede02667..b7594883 100644
--- a/guide/src/reference/types.md
+++ b/guide/src/reference/types.md
@@ -175,17 +175,23 @@ garbage-collected heap and the Wasm linear memory with `TextDecoder` and
 {{#include ../../../examples/guide-supported-types-examples/pointers.js}}
 ```
 
-## `u8` `i8` `u16` `i16` `u64` `i64` `isize` `size`
+## `u8` `i8` `u16` `i16` `u32` `i32` `u64` `i64` `isize` `usize` `f32` `f64`
 
 | `T` parameter | `&T` parameter | `&mut T` parameter | `T` return value | `Option<T>` parameter | `Option<T>` return value | JavaScript representation |
 |:---:|:---:|:---:|:---:|:---:|:---:|:---:|
-| Yes | No | No | Yes | No | No | A JavaScript number value |
+| Yes | No | No | Yes | Yes | Yes | A JavaScript number value |
 
-## `u32` `i32` `f32` `f64`
+### Example Rust Usage
 
-| `T` parameter | `&T` parameter | `&mut T` parameter | `T` return value | `Option<T>` parameter | `Option<T>` return value | JavaScript representation |
-|:---:|:---:|:---:|:---:|:---:|:---:|:---:|
-| Yes | Yes | Yes | Yes | No | No | A JavaScript number value |
+```rust
+{{#include ../../../examples/guide-supported-types-examples/src/numbers.rs}}
+```
+
+### Example JavaScript Usage
+
+```js
+{{#include ../../../examples/guide-supported-types-examples/numbers.js}}
+```
 
 ## `Box<[u8]>`  `Box<[i8]>` `Box<[u16]>` `Box<[i16]>` `Box<[u32]>` `Box<[i32]>` `Box<[u64]>` `Box<[i64]>` `Box<[f32]>` `Box<[f64]>`