diff --git a/docs/src/Attributes/array_max_items.md b/docs/src/Attributes/array_max_items.md
new file mode 100644
index 0000000..9ef7987
--- /dev/null
+++ b/docs/src/Attributes/array_max_items.md
@@ -0,0 +1,17 @@
+# Array: "max_items" validation
+
+The `#[validate(max_items = ???)]` attribute is used to determine the maximum number of items in an array.
+
+```rust
+# extern crate serde_valid;
+use serde_valid::Validate;
+
+#[derive(Validate)]
+struct Data(
+    #[validate(max_items = 2)]
+    Vec<u8>,
+);
+
+assert!(Data(vec![1, 2]).validate().is_ok());
+assert!(Data(vec![1, 2, 3]).validate().is_err());
+```
diff --git a/docs/src/Attributes/array_min_items.md b/docs/src/Attributes/array_min_items.md
new file mode 100644
index 0000000..da7924c
--- /dev/null
+++ b/docs/src/Attributes/array_min_items.md
@@ -0,0 +1,17 @@
+# Array: "min_items" validation
+
+The `#[validate(min_items = ???)]` attribute is used to determine the minimum number of items in an array.
+
+```rust
+# extern crate serde_valid;
+use serde_valid::Validate;
+
+#[derive(Validate)]
+struct Data(
+    #[validate(min_items = 3)]
+    Vec<u8>,
+);
+
+assert!(Data(vec![1, 2]).validate().is_err());
+assert!(Data(vec![1, 2, 3]).validate().is_ok());
+```
diff --git a/docs/src/Attributes/numeric_exclusive_maximum.md b/docs/src/Attributes/numeric_exclusive_maximum.md
index e24cfed..0bb3fee 100644
--- a/docs/src/Attributes/numeric_exclusive_maximum.md
+++ b/docs/src/Attributes/numeric_exclusive_maximum.md
@@ -15,4 +15,4 @@ struct Data (
 assert!(Data(5).validate().is_ok());
 assert!(Data(6).validate().is_err());
 assert!(Data(7).validate().is_err());
-```
\ No newline at end of file
+```
diff --git a/docs/src/Attributes/object_max_properties.md b/docs/src/Attributes/object_max_properties.md
new file mode 100644
index 0000000..382cbca
--- /dev/null
+++ b/docs/src/Attributes/object_max_properties.md
@@ -0,0 +1,24 @@
+# Object: "max_properties" validation
+
+The `#[validate(max_properties = ???)]` attribute is used to determine the maximum number of properties allowed in a map.
+
+```rust
+# extern crate serde_valid;
+use serde_valid::Validate;
+use std::collections::HashMap;
+
+#[derive(Validate)]
+struct Data(
+    #[validate(max_properties = 2)]
+    HashMap<String, String>,
+);
+
+let mut map = HashMap::new();
+map.insert("key1".to_string(), "value1".to_string());
+map.insert("key2".to_string(), "value2".to_string());
+
+assert!(Data(map.clone()).validate().is_ok());
+
+map.insert("key3".to_string(), "value3".to_string());
+assert!(Data(map.clone()).validate().is_err());
+```
diff --git a/docs/src/Attributes/object_min_properties.md b/docs/src/Attributes/object_min_properties.md
new file mode 100644
index 0000000..9362be4
--- /dev/null
+++ b/docs/src/Attributes/object_min_properties.md
@@ -0,0 +1,25 @@
+# Object: "min_properties" validation
+
+The `#[validate(min_properties = ???)]` attribute is used to determine the minimum number of properties allowed in a map.
+
+```rust
+# extern crate serde_valid;
+use serde_valid::Validate;
+use std::collections::HashMap;
+
+#[derive(Validate)]
+struct Data(
+    #[validate(min_properties = 3)]
+    HashMap<String, String>,
+);
+
+let mut map = HashMap::new();
+map.insert("key1".to_string(), "value1".to_string());
+map.insert("key2".to_string(), "value2".to_string());
+
+assert!(Data(map.clone()).validate().is_err());
+
+map.insert("key3".to_string(), "value3".to_string());
+
+assert!(Data(map.clone()).validate().is_ok());
+```
\ No newline at end of file
diff --git a/docs/src/SUMMARY.md b/docs/src/SUMMARY.md
index 73b4703..e839dc8 100644
--- a/docs/src/SUMMARY.md
+++ b/docs/src/SUMMARY.md
@@ -10,6 +10,10 @@
     - [Numeric: "exclusive_maximum"](./Attributes/numeric_exclusive_maximum.md)
     - [Numeric: "exclusive_minimum"](./Attributes/numeric_exclusive_minimum.md)
     - [Numeric: "multiple_of"](./Attributes/numeric_multiple_of.md)
+    - [Object: "max_properties"](./Attributes/object_max_properties.md)
+    - [Object: "min_properties"](./Attributes/object_min_properties.md)
+    - [Array: "max_items"](./Attributes/array_max_items.md)
+    - [Array: "min_items"](./Attributes/array_min_items.md)
     - [Nested validation](./Attributes/nested.md)
     - [Custom Message](./Attributes/custom_message.md)
 - [Trailt](./trait.md)