diff --git a/bukkit/bukkit-gui/src/main/java/me/hsgamer/hscore/bukkit/gui/BukkitGUIDisplay.java b/bukkit/bukkit-gui/src/main/java/me/hsgamer/hscore/bukkit/gui/BukkitGUIDisplay.java
index 1545f99f3b..fb798d0668 100644
--- a/bukkit/bukkit-gui/src/main/java/me/hsgamer/hscore/bukkit/gui/BukkitGUIDisplay.java
+++ b/bukkit/bukkit-gui/src/main/java/me/hsgamer/hscore/bukkit/gui/BukkitGUIDisplay.java
@@ -1,5 +1,6 @@
 package me.hsgamer.hscore.bukkit.gui;
 
+import me.hsgamer.hscore.bukkit.gui.object.BukkitInventorySize;
 import me.hsgamer.hscore.bukkit.gui.object.BukkitItem;
 import me.hsgamer.hscore.minecraft.gui.InventoryGUIDisplay;
 import me.hsgamer.hscore.minecraft.gui.object.InventorySize;
@@ -34,7 +35,7 @@ public BukkitGUIDisplay(UUID uuid, BukkitGUIHolder holder) {
   @Override
   protected void initInventory() {
     this.inventory = holder.getInventoryFunction().apply(this);
-    this.inventorySize = BukkitGUIUtils.getInventorySize(inventory);
+    this.inventorySize = new BukkitInventorySize(inventory);
   }
 
   @Override
diff --git a/bukkit/bukkit-gui/src/main/java/me/hsgamer/hscore/bukkit/gui/BukkitGUIUtils.java b/bukkit/bukkit-gui/src/main/java/me/hsgamer/hscore/bukkit/gui/BukkitGUIUtils.java
index 1f84cdf710..03e7ced6cf 100644
--- a/bukkit/bukkit-gui/src/main/java/me/hsgamer/hscore/bukkit/gui/BukkitGUIUtils.java
+++ b/bukkit/bukkit-gui/src/main/java/me/hsgamer/hscore/bukkit/gui/BukkitGUIUtils.java
@@ -2,7 +2,6 @@
 
 import me.hsgamer.hscore.bukkit.gui.event.BukkitClickEvent;
 import me.hsgamer.hscore.bukkit.gui.event.BukkitDragEvent;
-import me.hsgamer.hscore.minecraft.gui.object.InventorySize;
 import org.bukkit.Bukkit;
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.event.inventory.InventoryDragEvent;
@@ -117,36 +116,4 @@ public static Function<BukkitGUIDisplay, Inventory> getInventoryFunctionFromTitl
         : Bukkit.createInventory(display, type, title);
     };
   }
-
-  /**
-   * Get the inventory size from the inventory
-   *
-   * @param inventory the inventory
-   *
-   * @return the inventory size
-   */
-  public static InventorySize getInventorySize(Inventory inventory) {
-    return new InventorySize() {
-      @Override
-      public int getSize() {
-        return inventory.getSize();
-      }
-
-      @Override
-      public int getSlotPerRow() {
-        switch (inventory.getType()) {
-          case CHEST:
-          case ENDER_CHEST:
-          case SHULKER_BOX:
-            return 9;
-          case DISPENSER:
-          case DROPPER:
-          case HOPPER:
-            return 3;
-          default:
-            return getSize();
-        }
-      }
-    };
-  }
 }
diff --git a/bukkit/bukkit-gui/src/main/java/me/hsgamer/hscore/bukkit/gui/object/BukkitInventorySize.java b/bukkit/bukkit-gui/src/main/java/me/hsgamer/hscore/bukkit/gui/object/BukkitInventorySize.java
new file mode 100644
index 0000000000..efa086e6d0
--- /dev/null
+++ b/bukkit/bukkit-gui/src/main/java/me/hsgamer/hscore/bukkit/gui/object/BukkitInventorySize.java
@@ -0,0 +1,41 @@
+package me.hsgamer.hscore.bukkit.gui.object;
+
+import me.hsgamer.hscore.minecraft.gui.object.InventorySize;
+import org.bukkit.inventory.Inventory;
+
+/**
+ * The {@link InventorySize} of {@link Inventory}
+ */
+public class BukkitInventorySize implements InventorySize {
+  private final Inventory inventory;
+
+  /**
+   * Create a new instance
+   *
+   * @param inventory the inventory
+   */
+  public BukkitInventorySize(Inventory inventory) {
+    this.inventory = inventory;
+  }
+
+  @Override
+  public int getSize() {
+    return inventory.getSize();
+  }
+
+  @Override
+  public int getSlotPerRow() {
+    switch (inventory.getType()) {
+      case CHEST:
+      case ENDER_CHEST:
+      case SHULKER_BOX:
+        return 9;
+      case DISPENSER:
+      case DROPPER:
+      case HOPPER:
+        return 3;
+      default:
+        return getSize();
+    }
+  }
+}
diff --git a/minecraft/minecraft-gui/src/main/java/me/hsgamer/hscore/minecraft/gui/object/InventorySize.java b/minecraft/minecraft-gui/src/main/java/me/hsgamer/hscore/minecraft/gui/object/InventorySize.java
index f7840898de..46ab331cd2 100644
--- a/minecraft/minecraft-gui/src/main/java/me/hsgamer/hscore/minecraft/gui/object/InventorySize.java
+++ b/minecraft/minecraft-gui/src/main/java/me/hsgamer/hscore/minecraft/gui/object/InventorySize.java
@@ -20,7 +20,7 @@ public interface InventorySize {
    * @return the slot per row
    */
   default int getSlotPerRow() {
-    return 9;
+    return getSize();
   }
 
   /**
diff --git a/minestom/minestom-gui/src/main/java/me/hsgamer/hscore/minestom/gui/MinestomGUIDisplay.java b/minestom/minestom-gui/src/main/java/me/hsgamer/hscore/minestom/gui/MinestomGUIDisplay.java
index c5a3c34da2..b28f6f0956 100644
--- a/minestom/minestom-gui/src/main/java/me/hsgamer/hscore/minestom/gui/MinestomGUIDisplay.java
+++ b/minestom/minestom-gui/src/main/java/me/hsgamer/hscore/minestom/gui/MinestomGUIDisplay.java
@@ -4,6 +4,7 @@
 import me.hsgamer.hscore.minecraft.gui.object.InventorySize;
 import me.hsgamer.hscore.minecraft.gui.object.Item;
 import me.hsgamer.hscore.minestom.gui.inventory.DelegatingInventory;
+import me.hsgamer.hscore.minestom.gui.object.MinestomInventorySize;
 import me.hsgamer.hscore.minestom.gui.object.MinestomItem;
 import net.minestom.server.MinecraftServer;
 import net.minestom.server.entity.Player;
@@ -34,17 +35,7 @@ public MinestomGUIDisplay(@NotNull UUID uuid, @NotNull MinestomGUIHolder holder)
   protected void initInventory() {
     this.inventory = new DelegatingInventory(holder.getInventoryType(), holder.getTitleFunction().apply(uuid), this);
     this.inventory.init();
-    this.inventorySize = new InventorySize() {
-      @Override
-      public int getSize() {
-        return inventory.getSize();
-      }
-
-      @Override
-      public int getSlotPerRow() {
-        return inventory.getSlotPerRow();
-      }
-    };
+    this.inventorySize = new MinestomInventorySize(inventory);
   }
 
   @Override
diff --git a/minestom/minestom-gui/src/main/java/me/hsgamer/hscore/minestom/gui/inventory/DelegatingInventory.java b/minestom/minestom-gui/src/main/java/me/hsgamer/hscore/minestom/gui/inventory/DelegatingInventory.java
index bceaa81fb0..3f6c3ac211 100644
--- a/minestom/minestom-gui/src/main/java/me/hsgamer/hscore/minestom/gui/inventory/DelegatingInventory.java
+++ b/minestom/minestom-gui/src/main/java/me/hsgamer/hscore/minestom/gui/inventory/DelegatingInventory.java
@@ -78,23 +78,4 @@ public EventNode<InventoryEvent> getEventNode() {
   public MinestomGUIDisplay getDisplay() {
     return display;
   }
-
-  /**
-   * Get the slot per row of the inventory
-   *
-   * @return the slot per row
-   */
-  public int getSlotPerRow() {
-    switch (getInventoryType()) {
-      case CHEST_1_ROW, CHEST_2_ROW, CHEST_3_ROW, CHEST_4_ROW, CHEST_5_ROW, CHEST_6_ROW, SHULKER_BOX -> {
-        return 9;
-      }
-      case WINDOW_3X3, CRAFTER_3X3 -> {
-        return 3;
-      }
-      default -> {
-        return getSize();
-      }
-    }
-  }
 }
diff --git a/minestom/minestom-gui/src/main/java/me/hsgamer/hscore/minestom/gui/object/MinestomInventorySize.java b/minestom/minestom-gui/src/main/java/me/hsgamer/hscore/minestom/gui/object/MinestomInventorySize.java
new file mode 100644
index 0000000000..32557af721
--- /dev/null
+++ b/minestom/minestom-gui/src/main/java/me/hsgamer/hscore/minestom/gui/object/MinestomInventorySize.java
@@ -0,0 +1,40 @@
+package me.hsgamer.hscore.minestom.gui.object;
+
+import me.hsgamer.hscore.minecraft.gui.object.InventorySize;
+import net.minestom.server.inventory.Inventory;
+
+/**
+ * The {@link InventorySize} of {@link Inventory}
+ */
+public class MinestomInventorySize implements InventorySize {
+  private final Inventory inventory;
+
+  /**
+   * Create a new instance
+   *
+   * @param inventory the inventory
+   */
+  public MinestomInventorySize(Inventory inventory) {
+    this.inventory = inventory;
+  }
+
+  @Override
+  public int getSize() {
+    return inventory.getSize();
+  }
+
+  @Override
+  public int getSlotPerRow() {
+    switch (inventory.getInventoryType()) {
+      case CHEST_1_ROW, CHEST_2_ROW, CHEST_3_ROW, CHEST_4_ROW, CHEST_5_ROW, CHEST_6_ROW, SHULKER_BOX -> {
+        return 9;
+      }
+      case WINDOW_3X3, CRAFTER_3X3 -> {
+        return 3;
+      }
+      default -> {
+        return getSize();
+      }
+    }
+  }
+}