diff --git a/database/migrations/2026_06_10_110001_create_raw_materials_table.php b/database/migrations/2026_06_10_110001_create_raw_materials_table.php
index 86dd2f3..2826459 100644
--- a/database/migrations/2026_06_10_110001_create_raw_materials_table.php
+++ b/database/migrations/2026_06_10_110001_create_raw_materials_table.php
@@ -1,5 +1,6 @@
 <?php
 
+use App\Enums\RawMaterialUnit;
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
@@ -12,7 +13,7 @@ public function up(): void
             $table->id();
 
             $table->string('name', 200);
-            $table->string('unit', 20);
+            $table->enum('unit', array_column(RawMaterialUnit::cases(), 'value'));
             $table->boolean('is_active')->default(true);
 
             $table->timestamp('created_at')->useCurrent();
diff --git a/resources/js/components/admin/master/raw-materials/RawMaterialForm.vue b/resources/js/components/admin/master/raw-materials/RawMaterialForm.vue
index 6a973d2..7ceee12 100644
--- a/resources/js/components/admin/master/raw-materials/RawMaterialForm.vue
+++ b/resources/js/components/admin/master/raw-materials/RawMaterialForm.vue
@@ -29,6 +29,7 @@ import { appendMediaToFormData, createMediaUploadState } from '@/types/media';
 import type {
     EnumOption,
     RawMaterialPriceFormItem,
+    RawMaterialUnit,
 } from '@/types/raw-material';
 
 const props = withDefaults(
@@ -36,7 +37,7 @@ const props = withDefaults(
         units: EnumOption[];
         initialData?: {
             name?: string;
-            unit?: string;
+            unit?: RawMaterialUnit;
             prices?: Array<{
                 id?: number;
                 variant?: string;
diff --git a/resources/js/types/raw-material.ts b/resources/js/types/raw-material.ts
index 75cd903..63c956a 100644
--- a/resources/js/types/raw-material.ts
+++ b/resources/js/types/raw-material.ts
@@ -1,7 +1,9 @@
 import type { MediaItem, MediaUploadState } from '@/types/media';
 
+export type RawMaterialUnit = 'yard' | 'meter' | 'kilogram';
+
 export type EnumOption = {
-    value: string;
+    value: RawMaterialUnit;
     label: string;
 };
 
@@ -20,7 +22,7 @@ export type RawMaterialPrice = {
 export type RawMaterialListItem = {
     id: number;
     name: string;
-    unit: string;
+    unit: RawMaterialUnit;
     unit_label: string;
     unit_abbreviation: string;
     is_active: boolean;
@@ -38,7 +40,7 @@ export type RawMaterialPriceFormItem = {
 
 export type RawMaterialFormData = {
     name: string;
-    unit: string;
+    unit: RawMaterialUnit;
     prices: Array<{
         id?: number;
         variant: string;