---
title: ".STACK | Microsoft Docs"
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ms.date: "11/04/2016"
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ms.technology: ["cpp-tools"]
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ms.topic: "article"
f1_keywords: [".STACK"]
dev_langs: ["C++"]
helpviewer_keywords: [".STACK directive"]
ms.assetid: 70019463-5d4f-41b6-8464-023a8ac2466f
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author: "corob-msft"
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---
# .STACK
When used with [.MODEL](../../assembler/masm/dot-model.md), defines a stack segment (with segment name STACK). The optional `size` specifies the number of bytes for the stack (default 1,024). The `.STACK` directive automatically closes the stack statement.  
  
## Syntax  
  
```  
  
.STACK [[size]]  
```  
  
## See Also  
 [Directives Reference](../../assembler/masm/directives-reference.md)