diff --git a/package.json b/package.json
index 5993a24..f8612a9 100644
--- a/package.json
+++ b/package.json
@@ -76,6 +76,33 @@
 						"markdownDescription": "Use `private` accessor keyword for private members",
 						"default": true
 					},
+					"unity-code-snippets.classAccessibilityLevel": {
+						"type": "string",
+						"markdownDescription": "Select the class accessibility levels.",
+						"order": 20,
+						"default": "public",
+						"enum": [
+							"public",
+							"internal",
+							"none"
+						],
+						"enumItemLabels": [
+							"public",
+							"internal",
+							"empty (internal)"
+						],
+						"markdownEnumDescriptions": [
+							"[Access is not restricted.](https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/public)",
+							"[Access is limited to the current assembly.](https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/internal)",
+							"Uses nothing which lets C# use the default [(internal)](https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/class) option."
+						]
+					},
+					"unity-code-snippets.useSealedClasses": {
+						"type": "boolean",
+						"order": 30,
+						"markdownDescription": "[When applied to a class, the sealed modifier prevents other classes from inheriting from it.](https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/sealed)",
+						"default": false
+					},
 					"unity-code-snippets.autoComplete.classes": {
 						"type": "boolean",
 						"order": 100,
diff --git a/src/model.ts b/src/model.ts
index 8eeedff..c4fa1e8 100644
--- a/src/model.ts
+++ b/src/model.ts
@@ -4,8 +4,9 @@ export const DEST_PATH = 'snippets/snippets.json';
 export const ISSUES_URL = 'https://github.com/kleber-swf/vscode-unity-code-snippets/issues';
 
 export type IndentationStyle = 'kr' | 'allman';
+export type ClassAccessibilityLevel = 'public' | 'internal' | 'none';
 
-export type ReplaceType = 'PRIVATE' | 'LINE_BREAK' | 'TAB';
+export type ReplaceType = 'PRIVATE' | 'CLASS_DECLERATION' | 'LINE_BREAK' | 'TAB';
 export type Replaces = Record<ReplaceType, string>;
 
 export const TEMPLATES = ['classes', 'methods', 'calls', 'attributes', 'experimentalAttributes'] as const;
diff --git a/src/options.ts b/src/options.ts
index 2f59781..807ce83 100644
--- a/src/options.ts
+++ b/src/options.ts
@@ -1,5 +1,5 @@
 import * as vscode from 'vscode';
-import { AutoCompletes, IndentationStyle, Options, Replaces, TEMPLATES } from './model';
+import { AutoCompletes, ClassAccessibilityLevel, IndentationStyle, Options, Replaces, TEMPLATES } from './model';
 
 export function parseOptions(conf: vscode.WorkspaceConfiguration): Options {
 	return {
@@ -18,12 +18,21 @@ function parseAutoCompletes(conf: vscode.WorkspaceConfiguration): AutoCompletes
 function parseReplaces(conf: vscode.WorkspaceConfiguration): Replaces {
 	const style = conf.get('style') as IndentationStyle;
 	const usePrivateKeyword = conf.get('usePrivateKeyword') as boolean;
+	const classAccessibilityLevelKeyword = conf.get('classAccessibilityLevel') as ClassAccessibilityLevel;
+	const useSealedClassesKeyword = conf.get('useSealedClasses') as boolean;
 
 	const replaces: Replaces = {} as any;
 
 	// private keyword
 	replaces.PRIVATE = usePrivateKeyword ? 'private ' : '';
 
+	replaces.CLASS_DECLERATION =
+		// class accessibility level
+		(classAccessibilityLevelKeyword === 'none' ? '' : `${classAccessibilityLevelKeyword} `) +
+		// sealed keyword
+		(useSealedClassesKeyword ? 'sealed ' : '') +
+		'class';
+
 	// indentation style
 	if (style === 'allman') {
 		replaces.LINE_BREAK = '",\n\t\t\t"';
diff --git a/templates/classes.json b/templates/classes.json
index 8e223ef..e2eae5a 100644
--- a/templates/classes.json
+++ b/templates/classes.json
@@ -5,7 +5,7 @@
 		"body": [
 			"using UnityEngine;",
 			"",
-			"public class ${TM_FILENAME_BASE} : MonoBehaviour%LINE_BREAK%{",
+			"%CLASS_DECLERATION% ${TM_FILENAME_BASE} : MonoBehaviour%LINE_BREAK%{",
 			"\t$0",
 			"}"
 		]
@@ -17,7 +17,7 @@
 		"body": [
 			"using UnityEngine;",
 			"",
-			"public class ${TM_FILENAME_BASE} : StateMachineBehaviour%LINE_BREAK%{",
+			"%CLASS_DECLERATION% ${TM_FILENAME_BASE} : StateMachineBehaviour%LINE_BREAK%{",
 			"\tpublic override void OnStateEnter(Animator animator, AnimatorStateInfo stateInfo, int layerIndex)%LINE_BREAK%%TAB%{",
 			"\t\t$0",
 			"\t}",
@@ -32,7 +32,7 @@
 			"using UnityEngine;",
 			"using UnityEngine.Networking;",
 			"",
-			"public class ${TM_FILENAME_BASE} : NetworkBehaviour%LINE_BREAK%{",
+			"%CLASS_DECLERATION% ${TM_FILENAME_BASE} : NetworkBehaviour%LINE_BREAK%{",
 			"\t$0",
 			"}"
 		]
@@ -45,7 +45,7 @@
 			"using UnityEngine;",
 			"",
 			"[CreateAssetMenu(fileName = \"${1:${TM_FILENAME_BASE}}\", menuName = \"${2:${TM_FILENAME_BASE}}\", order = ${3:0})]",
-			"public class ${TM_FILENAME_BASE} : ScriptableObject%LINE_BREAK%{",
+			"%CLASS_DECLERATION% ${TM_FILENAME_BASE} : ScriptableObject%LINE_BREAK%{",
 			"\t$0",
 			"}"
 		]
@@ -59,7 +59,7 @@
 			"using UnityEditor;",
 			"",
 			"[CustomEditor(typeof(${1:${TM_FILENAME_BASE/(.*)Editor/${1}/}}))]",
-			"public class ${TM_FILENAME_BASE} : Editor%LINE_BREAK%{",
+			"%CLASS_DECLERATION% ${TM_FILENAME_BASE} : Editor%LINE_BREAK%{",
 			"\tpublic override void OnInspectorGUI()%LINE_BREAK%%TAB%{",
 			"\t\tbase.OnInspectorGUI();",
 			"\t\t$0",
@@ -77,7 +77,7 @@
 			"using UnityEditorInternal;",
 			"",
 			"[CustomEditor(typeof(${1:${TM_FILENAME_BASE/(.*)Editor/${1}/}}))]",
-			"public class ${TM_FILENAME_BASE} : Editor%LINE_BREAK%{",
+			"%CLASS_DECLERATION% ${TM_FILENAME_BASE} : Editor%LINE_BREAK%{",
 			"\t%PRIVATE%SerializedProperty _property;",
 			"\t%PRIVATE%ReorderableList _list;",
 			"",
@@ -115,7 +115,7 @@
 			"using UnityEngine;",
 			"using UnityEditor;",
 			"",
-			"public class ${TM_FILENAME_BASE} : EditorWindow%LINE_BREAK%{",
+			"%CLASS_DECLERATION% ${TM_FILENAME_BASE} : EditorWindow%LINE_BREAK%{",
 			"\t[MenuItem(\"${1:${TM_FILEPATH/.*\\\\(.*)\\\\Assets\\\\.*/${1}/}/${TM_FILENAME_BASE/(.*)Editor/${1}/}}\")]",
 			"\t%PRIVATE%static void ShowWindow()%LINE_BREAK%%TAB%{",
 			"\t\tvar window = GetWindow<${TM_FILENAME_BASE}>();",
@@ -138,7 +138,7 @@
 			"using UnityEditor;",
 			"",
 			"[CustomPropertyDrawer(typeof(${1:${TM_FILENAME_BASE/(.*)Drawer/${1}/}}))]",
-			"public class ${TM_FILENAME_BASE}: PropertyDrawer%LINE_BREAK%{",
+			"%CLASS_DECLERATION% ${TM_FILENAME_BASE}: PropertyDrawer%LINE_BREAK%{",
 			"\tpublic override void OnGUI(Rect position, SerializedProperty property, GUIContent label)%LINE_BREAK%%TAB%{",
 			"\t\t$0",
 			"\t}",
@@ -153,7 +153,7 @@
 			"using UnityEngine;",
 			"using UnityEditor;",
 			"",
-			"public class ${TM_FILENAME_BASE}: ScriptableWizard%LINE_BREAK%{",
+			"%CLASS_DECLERATION% ${TM_FILENAME_BASE}: ScriptableWizard%LINE_BREAK%{",
 			"\t[MenuItem(\"${1:${TM_FILEPATH/.*\\\\(.*)\\\\Assets\\\\.*/${1}/}/${TM_FILENAME_BASE/(.*)Wizard/${1}/}}\")]",
 			"\t%PRIVATE%static void MenuEntryCall()%LINE_BREAK%%TAB%{",
 			"\t\tDisplayWizard<${TM_FILENAME_BASE}>(\"${2:Title}\");",
@@ -169,7 +169,7 @@
 	"General class": {
 		"prefix": "class",
 		"description": "Creates a standard class.",
-		"body": ["public class ${TM_FILENAME_BASE}%LINE_BREAK%{", "\t$0", "}"]
+		"body": ["%CLASS_DECLERATION% ${TM_FILENAME_BASE}%LINE_BREAK%{", "\t$0", "}"]
 	},
 
 	"General interface": {