diff --git a/src/assertions/index.ts b/src/assertions/index.ts
index 01cf26a..a47f7bf 100644
--- a/src/assertions/index.ts
+++ b/src/assertions/index.ts
@@ -27,6 +27,8 @@ export * from "./options";
 export * from "./or";
 export * from "./or2";
 export * from "./or3";
+export * from "./rangeLength";
+export * from "./rangeValue";
 export * from "./regex";
 export * from "./startsWith";
 export * from "./string";
diff --git a/src/assertions/rangeLength/index.test-d.ts b/src/assertions/rangeLength/index.test-d.ts
new file mode 100644
index 0000000..2f45204
--- /dev/null
+++ b/src/assertions/rangeLength/index.test-d.ts
@@ -0,0 +1,5 @@
+import type { Assertion } from "@the-minimal/types";
+import { assertType } from "vitest";
+import { rangeLength } from ".";
+
+assertType<Assertion<{ length: number }>>(rangeLength(8, 16));
diff --git a/src/assertions/rangeLength/index.test.ts b/src/assertions/rangeLength/index.test.ts
new file mode 100644
index 0000000..69fecef
--- /dev/null
+++ b/src/assertions/rangeLength/index.test.ts
@@ -0,0 +1,20 @@
+import { rangeLength } from "@assertions/rangeLength";
+import { fc, test } from "@fast-check/vitest";
+import { expect } from "vitest";
+
+const assertion = rangeLength(8, 16);
+
+test.prop([fc.string({ minLength: 8, maxLength: 16 })])(
+	"should not throw if length of value is in the range of min and max",
+	(value) => {
+		expect(() => assertion(value)).not.toThrow();
+	},
+);
+
+test.prop([fc.string({ maxLength: 7 }), fc.string({ minLength: 17 })])(
+	"should not throw if length of value is not in the range of min and max",
+	(v1, v2) => {
+		expect(() => assertion(v1)).toThrow();
+		expect(() => assertion(v2)).toThrow();
+	},
+);
diff --git a/src/assertions/rangeLength/index.ts b/src/assertions/rangeLength/index.ts
new file mode 100644
index 0000000..ced7904
--- /dev/null
+++ b/src/assertions/rangeLength/index.ts
@@ -0,0 +1,23 @@
+import { error } from "@error";
+import type { Assertion } from "@the-minimal/types";
+
+/**
+ * Checks if length of value is in the range of min and max.
+ *
+ * @param min - Minimal value.
+ * @param max - Maximal value.
+ *
+ * @example
+ * ```ts
+ * const passwordLength = rangeLength(8, 16);
+ *
+ * passwordLength("hello"); // Error: rangeLength
+ * passwordLength("aaaaaaaaaaaaaaaaaaaa"); // Error: rangeLength
+ * passwordLength("Test123456"); // passes
+ * ```
+ */
+export const rangeLength =
+	(min: number, max: number): Assertion<{ length: number }> =>
+	(v) =>
+		((v as any).length >= min && (v as any).length <= max) ||
+		error("rangeLength", v, { min, max });
diff --git a/src/assertions/rangeValue/index.test-d.ts b/src/assertions/rangeValue/index.test-d.ts
new file mode 100644
index 0000000..843c75c
--- /dev/null
+++ b/src/assertions/rangeValue/index.test-d.ts
@@ -0,0 +1,5 @@
+import { rangeValue } from "@assertions/rangeValue";
+import type { Assertion } from "@the-minimal/types";
+import { assertType } from "vitest";
+
+assertType<Assertion<number>>(rangeValue(0, 150));
diff --git a/src/assertions/rangeValue/index.test.ts b/src/assertions/rangeValue/index.test.ts
new file mode 100644
index 0000000..6c3b4c8
--- /dev/null
+++ b/src/assertions/rangeValue/index.test.ts
@@ -0,0 +1,20 @@
+import { rangeValue } from "@assertions/rangeValue";
+import { fc, test } from "@fast-check/vitest";
+import { expect } from "vitest";
+
+const assertion = rangeValue(0, 150);
+
+test.prop([fc.integer({ min: 0, max: 150 })])(
+	"should not throw if value is in the range of min and max",
+	(value) => {
+		expect(() => assertion(value)).not.toThrow();
+	},
+);
+
+test.prop([fc.integer({ max: -1 }), fc.integer({ min: 151 })])(
+	"should not throw if value is not in the range of min and max",
+	(v1, v2) => {
+		expect(() => assertion(v1)).toThrow();
+		expect(() => assertion(v2)).toThrow();
+	},
+);
diff --git a/src/assertions/rangeValue/index.ts b/src/assertions/rangeValue/index.ts
new file mode 100644
index 0000000..ac7f04e
--- /dev/null
+++ b/src/assertions/rangeValue/index.ts
@@ -0,0 +1,23 @@
+import { error } from "@error";
+import type { Assertion } from "@the-minimal/types";
+
+/**
+ * Checks if value is in the range of min and max.
+ *
+ * @param min - Minimal value.
+ * @param max - Maximal value.
+ *
+ * @example
+ * ```ts
+ * const alive = rangeValue(0, 150);
+ *
+ * alive(-10); // Error: rangeValue
+ * alive(450); // Error: rangeValue
+ * alive(26); // passes
+ * ```
+ */
+export const rangeValue =
+	<$Type>(min: $Type, max: $Type): Assertion<$Type> =>
+	(v) =>
+		((v as any) >= min && (v as any) <= max) ||
+		error("rangeValue", v, { min, max });