diff --git a/src/pocketmine/inventory/BigCraftingGrid.php b/src/pocketmine/inventory/BigCraftingGrid.php
index 765189b6e..3c814c5e1 100644
--- a/src/pocketmine/inventory/BigCraftingGrid.php
+++ b/src/pocketmine/inventory/BigCraftingGrid.php
@@ -25,7 +25,7 @@ namespace pocketmine\inventory;
 
 class BigCraftingGrid extends CraftingGrid{
 
-	public function getDefaultSize() : int{
-		return 9;
+	public function getGridWidth() : int{
+		return 3;
 	}
 }
\ No newline at end of file
diff --git a/src/pocketmine/inventory/CraftingGrid.php b/src/pocketmine/inventory/CraftingGrid.php
index c459fb078..5b66e1c32 100644
--- a/src/pocketmine/inventory/CraftingGrid.php
+++ b/src/pocketmine/inventory/CraftingGrid.php
@@ -31,8 +31,12 @@ class CraftingGrid extends BaseInventory{
 		parent::__construct($holder);
 	}
 
+	public function getGridWidth() : int{
+		return 2;
+	}
+
 	public function getDefaultSize() : int{
-		return 4;
+		return $this->getGridWidth() ** 2;
 	}
 
 	public function setSize(int $size){
diff --git a/src/pocketmine/inventory/transaction/CraftingTransaction.php b/src/pocketmine/inventory/transaction/CraftingTransaction.php
index 0b4fa7fd0..1755f8d36 100644
--- a/src/pocketmine/inventory/transaction/CraftingTransaction.php
+++ b/src/pocketmine/inventory/transaction/CraftingTransaction.php
@@ -46,7 +46,7 @@ class CraftingTransaction extends InventoryTransaction{
 	protected $recipe = null;
 
 	public function __construct(Player $source, $actions = []){
-		$this->gridSize = ($source->getCraftingGrid() instanceof BigCraftingGrid) ? 3 : 2;
+		$this->gridSize = $source->getCraftingGrid()->getGridWidth();
 
 		$air = ItemFactory::get(Item::AIR, 0, 0);
 		$this->inputs = array_fill(0, $this->gridSize, array_fill(0, $this->gridSize, $air));