diff --git a/CHANGELOG.md b/CHANGELOG.md
index eb04451f..ab6503c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,11 @@ The changelog for `MessageKit`. Also see the [releases](https://github.com/Messa
 
 ## Upcoming release
 
+### Added
+
+- Added convenience method to set properties for all `MessageSizeCalculator`s.
+[#697](https://github.com/MessageKit/MessageKit/pull/697) by [@zhongwuzw](https://github.com/zhongwuzw).
+
 ## [[Prerelease] 1.0.0-beta.1](https://github.com/MessageKit/MessageKit/releases/tag/1.0.0-beta.1)
 
 ### Added
diff --git a/Sources/Layout/MessagesCollectionViewFlowLayout.swift b/Sources/Layout/MessagesCollectionViewFlowLayout.swift
index a3ee26a7..c34f5e0f 100644
--- a/Sources/Layout/MessagesCollectionViewFlowLayout.swift
+++ b/Sources/Layout/MessagesCollectionViewFlowLayout.swift
@@ -33,7 +33,7 @@ open class MessagesCollectionViewFlowLayout: UICollectionViewFlowLayout {
         return MessagesCollectionViewLayoutAttributes.self
     }
     
-    /** The `MessagesCollectionView` that owns this layout object. */
+    /// The `MessagesCollectionView` that owns this layout object.
     public var messagesCollectionView: MessagesCollectionView {
         guard let messagesCollectionView = collectionView as? MessagesCollectionView else {
             fatalError(MessageKitError.layoutUsedOnForeignType)
@@ -41,7 +41,7 @@ open class MessagesCollectionViewFlowLayout: UICollectionViewFlowLayout {
         return messagesCollectionView
     }
     
-    /** The `MessagesDataSource` for the layout's collection view. */
+    /// The `MessagesDataSource` for the layout's collection view.
     public var messagesDataSource: MessagesDataSource {
         guard let messagesDataSource = messagesCollectionView.messagesDataSource else {
             fatalError(MessageKitError.nilMessagesDataSource)
@@ -49,7 +49,7 @@ open class MessagesCollectionViewFlowLayout: UICollectionViewFlowLayout {
         return messagesDataSource
     }
     
-    /** The `MessagesLayoutDelegate` for the layout's collection view. */
+    /// The `MessagesLayoutDelegate` for the layout's collection view.
     public var messagesLayoutDelegate: MessagesLayoutDelegate {
         guard let messagesLayoutDelegate = messagesCollectionView.messagesLayoutDelegate else {
             fatalError(MessageKitError.nilMessagesLayoutDelegate)
@@ -155,4 +155,70 @@ open class MessagesCollectionViewFlowLayout: UICollectionViewFlowLayout {
         let calculator = cellSizeCalculatorForItem(at: indexPath)
         return calculator.sizeForItem(at: indexPath)
     }
+    
+    /// Set `incomingAvatarSize` of all `MessageSizeCalculator`s
+    public func setMessageIncomingAvatarSize(_ newSize: CGSize) {
+        messageSizeCalculators().forEach { $0.incomingAvatarSize = newSize }
+    }
+    
+    /// Set `outgoingAvatarSize` of all `MessageSizeCalculator`s
+    public func setMessageOutgoingAvatarSize(_ newSize: CGSize) {
+        messageSizeCalculators().forEach { $0.outgoingAvatarSize = newSize }
+    }
+    
+    /// Set `incomingAvatarPosition` of all `MessageSizeCalculator`s
+    public func setMessageIncomingAvatarPosition(_ newPosition: AvatarPosition) {
+        messageSizeCalculators().forEach { $0.incomingAvatarPosition = newPosition }
+    }
+    
+    /// Set `outgoingAvatarPosition` of all `MessageSizeCalculator`s
+    public func setMessageOutgoingAvatarPosition(_ newPosition: AvatarPosition) {
+        messageSizeCalculators().forEach { $0.outgoingAvatarPosition = newPosition }
+    }
+    
+    /// Set `incomingMessagePadding` of all `MessageSizeCalculator`s
+    public func setMessageIncomingMessagePadding(_ newPadding: UIEdgeInsets) {
+        messageSizeCalculators().forEach { $0.incomingMessagePadding = newPadding }
+    }
+    
+    /// Set `outgoingMessagePadding` of all `MessageSizeCalculator`s
+    public func setMessageOutgoingMessagePadding(_ newPadding: UIEdgeInsets) {
+        messageSizeCalculators().forEach { $0.outgoingMessagePadding = newPadding }
+    }
+    
+    /// Set `incomingCellTopLabelAlignment` of all `MessageSizeCalculator`s
+    public func setMessageIncomingCellTopLabelAlignment(_ newAlignment: LabelAlignment) {
+        messageSizeCalculators().forEach { $0.incomingCellTopLabelAlignment = newAlignment }
+    }
+    
+    /// Set `outgoingCellTopLabelAlignment` of all `MessageSizeCalculator`s
+    public func setMessageOutgoingCellTopLabelAlignment(_ newAlignment: LabelAlignment) {
+        messageSizeCalculators().forEach { $0.outgoingCellTopLabelAlignment = newAlignment }
+    }
+    
+    /// Set `incomingMessageTopLabelAlignment` of all `MessageSizeCalculator`s
+    public func setMessageIncomingMessageTopLabelAlignment(_ newAlignment: LabelAlignment) {
+        messageSizeCalculators().forEach { $0.incomingMessageTopLabelAlignment = newAlignment }
+    }
+    
+    /// Set `outgoingMessageTopLabelAlignment` of all `MessageSizeCalculator`s
+    public func setMessageOutgoingMessageTopLabelAlignment(_ newAlignment: LabelAlignment) {
+        messageSizeCalculators().forEach { $0.outgoingMessageTopLabelAlignment = newAlignment }
+    }
+    
+    /// Set `incomingMessageBottomLabelAlignment` of all `MessageSizeCalculator`s
+    public func setMessageIncomingMessageBottomLabelAlignment(_ newAlignment: LabelAlignment) {
+        messageSizeCalculators().forEach { $0.incomingMessageBottomLabelAlignment = newAlignment }
+    }
+    
+    /// Set `outgoingMessageBottomLabelAlignment` of all `MessageSizeCalculator`s
+    public func setMessageOutgoingMessageBottomLabelAlignment(_ newAlignment: LabelAlignment) {
+        messageSizeCalculators().forEach { $0.outgoingMessageBottomLabelAlignment = newAlignment }
+    }
+    
+    /// Get all `MessageSizeCalculator`s
+    open func messageSizeCalculators() -> [MessageSizeCalculator] {
+        return [textMessageSizeCalculator, attributedTextMessageSizeCalculator, emojiMessageSizeCalculator, photoMessageSizeCalculator, videoMessageSizeCalculator, locationMessageSizeCalculator]
+    }
+    
 }