diff --git a/Sources/SwiftNetwork/Protocols/Frame.swift b/Sources/SwiftNetwork/Protocols/Frame.swift
index f4b8500..b36bb07 100644
--- a/Sources/SwiftNetwork/Protocols/Frame.swift
+++ b/Sources/SwiftNetwork/Protocols/Frame.swift
@@ -37,26 +37,34 @@ public struct Frame: ~Copyable {
         case customFinalizer(buffer: UnsafeMutableRawBufferPointer, finalizer: (UnsafeMutableRawBufferPointer) -> Void)
     }
 
-    public var buffer: Buffer
-
     var _bytes: NetworkUniqueArray<UInt8> = .init()
+    var protocolMetadatas: NetworkUniqueDeque<FrameProtocolMetadata> = .init(minimumCapacity: 0)
+    var ipPacketValues: IPPacketValues? = nil
+    public var buffer: Buffer
+    var appMetadata: AppMetadata? = nil
 
     private var _startOffset: UInt32 = 0
+
+    var timestamp: FrameTimestamp? = nil
+    var flags: Flags = Flags()
+    var _metadataComplete: Bool = false
+    public var connectionComplete: Bool = false
+    private var _endOffset: UInt32 = 0
+    private var _effectiveBufferLength: UInt32 = 0
+    private var _aggregateBufferLength: UInt32 = 0
+
     @usableFromInline var startOffset: Int {
         get { Int(_startOffset) }
         set { _startOffset = UInt32(newValue) }
     }
-    private var _endOffset: UInt32 = 0
     @usableFromInline var endOffset: Int {
         get { Int(_endOffset) }
         set { _endOffset = UInt32(newValue) }
     }
-    private var _effectiveBufferLength: UInt32 = 0
     var effectiveBufferLength: Int {
         get { Int(_effectiveBufferLength) }
         set { _effectiveBufferLength = UInt32(newValue) }
     }
-    private var _aggregateBufferLength: UInt32 = 0
     var aggregateBufferLength: Int {
         get { Int(_aggregateBufferLength) }
         set { _aggregateBufferLength = UInt32(newValue) }
@@ -464,7 +472,6 @@ public struct Frame: ~Copyable {
         static let isBackground = Frame.Flags(rawValue: 1 << 5)
         static let isRealtime = Frame.Flags(rawValue: 1 << 6)
     }
-    var flags: Flags = Flags()
 
     struct IPPacketValues {
         struct Flags: OptionSet {
@@ -507,13 +514,11 @@ public struct Frame: ~Copyable {
             }
         }
     }
-    var ipPacketValues: IPPacketValues? = nil
 
     struct AppMetadata: ~Copyable {
         let appType: UInt8
         let appMetadata: UInt8
     }
-    var appMetadata: AppMetadata? = nil
 
     var isSingleIPAggregate: Bool {
         get { flags.contains(.isSingleIPAggregate) }
@@ -671,7 +676,6 @@ public struct Frame: ~Copyable {
         var metadata: AbstractProtocolMetadata
         var metadataComplete: Bool = false
     }
-    var protocolMetadatas: NetworkUniqueDeque<FrameProtocolMetadata> = .init(minimumCapacity: 0)
 
     public var firstMetadata: AbstractProtocolMetadata? {
         guard protocolMetadatas.count > 0 else {
@@ -679,7 +683,6 @@ public struct Frame: ~Copyable {
         }
         return protocolMetadatas[0].metadata
     }
-    var _metadataComplete: Bool = false
     var metadataComplete: Bool {
         get {
             if protocolMetadatas.count > 0 {
@@ -689,13 +692,11 @@ public struct Frame: ~Copyable {
         }
         set { _metadataComplete = newValue }
     }
-    public var connectionComplete: Bool = false
 
     enum FrameTimestamp {
         case receiveTime(_ timestamp: NetworkClock.Instant)
         case expireTime(_ timestamp: NetworkClock.Instant)
     }
-    var timestamp: FrameTimestamp? = nil
 
     mutating func reduceAggregateBufferLength(by length: Int) {
         if isSingleIPAggregate {
diff --git a/Tests/SwiftNetworkTests/SwiftNetworkFrameTests.swift b/Tests/SwiftNetworkTests/SwiftNetworkFrameTests.swift
new file mode 100644
index 0000000..6d4f283
--- /dev/null
+++ b/Tests/SwiftNetworkTests/SwiftNetworkFrameTests.swift
@@ -0,0 +1,24 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift open source project
+//
+// Copyright (c) 2026 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of Swift project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+@_spi(Essentials) @_spi(ProtocolProvider) import SwiftNetwork
+import XCTest
+
+@available(anyAppleOS 27, *)
+final class SwiftNetworkFrameTests: XCTestCase {
+    func testFrameLayout() {
+        XCTAssertEqual(MemoryLayout<Frame>.size, 136)
+        XCTAssertEqual(MemoryLayout<Frame>.stride, 136)
+    }
+}