diff --git a/README.md b/README.md
index ccb8edf..cc6a6a0 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,7 @@
 | `LengthLower(num: number)`                           | Checks if the length is lower than the specified number.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
 | `IsRegex(regex: RegExp)`                             | Checks if the string match the given RegExp.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
 | `IsEmail()`                                          | Checks if the string is an email.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
+| `IsFullWidth()`                                      | Checks if the string is a full-width string. Example ａ, ｂ, ｃ.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
 | `IsPhoneNumber(country: string)`                     | Checks if the string is a local phone number for a country. Country must be ISO 3166 c.a.d 2 letter code. Example: FR, US, UK, DE                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
 | `IsHalfWidth()`                                      | Checks if the string is half-width string. Example: A, b, c.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
 | `IsInternationalPhoneNumber()`                       | Checks if the string is an international phone number with extension and with or without leading 0. Example: +330XXXXXXXXX or +33XXXXXXXXX                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
diff --git a/spec/validators/common.test.ts b/spec/validators/common.test.ts
index d40f5e6..cf366e6 100644
--- a/spec/validators/common.test.ts
+++ b/spec/validators/common.test.ts
@@ -20,6 +20,7 @@ import {
 	IsDecimal,
 	IsDivisibleBy,
 	IsEmpty,
+	IsFullWidth,
 	IsHalfWidth,
 	IsHexadecimal,
 	IsHexColor,
@@ -81,6 +82,8 @@ class BodyPayload {
 
 	@IsEmpty()
 	public isEmpty!: string;
+	@IsFullWidth()
+	public isFullWidth!: string;
 
 	@IsLowerCase()
 	public isLowerCase!: string;
@@ -126,6 +129,7 @@ Deno.test('Common validators errors', async (ctx) => {
 	failingPayload.isDate = 'nonDate';
 	failingPayload.isDecimal = 'nondecimal';
 	failingPayload.isEmpty = 'nonEmpty';
+	failingPayload.isFullWidth = 'hello';
 	failingPayload.isLowerCase = 'UPPERCASE';
 	failingPayload.isHalfWidth = 'Ｈｅｌｌｏ';
 	failingPayload.IsHexColor = 'nonHexcolor';
@@ -283,6 +287,13 @@ Deno.test('Common validators errors', async (ctx) => {
 			property: 'isEmpty',
 		}]);
 	});
+	await ctx.step('IsFullWidth', () => {
+		assertArrayIncludes(errors, [{
+			errorMessage: `Property must be a full-width string`,
+			constraints: [],
+			property: 'isFullWidth',
+		}]);
+	});
 	await ctx.step('IsLowerCase', () => {
 		assertArrayIncludes(errors, [{
 			errorMessage: `Property must be a string in lower case`,
diff --git a/validators/common.ts b/validators/common.ts
index a65fb87..3d767e5 100644
--- a/validators/common.ts
+++ b/validators/common.ts
@@ -18,6 +18,7 @@ import {
 	isDecimal,
 	isDivisibleBy,
 	isEmpty,
+	isFullWidth,
 	isHalfWidth,
 	isHexadecimal,
 	isHexColor,
@@ -198,6 +199,15 @@ export function IsDecimal(options = defaultDecimalOptions): PropertyDecorator {
 		constraints: [options],
 	});
 }
+/**
+ * Decorator that checks if the property is full-width.
+ */
+export function IsFullWidth(): PropertyDecorator {
+	return createDecorator((prop: string) => isFullWidth(prop), {
+		errorMessage: `Property must be a full-width string`,
+		constraints: [],
+	});
+}
 /**
  * Decorator that checks if the property is empty.
  */