# Understand CloudFormation quotas
Your AWS account has CloudFormation quotas that you might need to know when authoring templates and creating stacks. By understanding these quotas, you can avoid limitation errors that would require you to redesign your templates or stacks.
The following table shows the CloudFormation quotas.
| Quotas | Description | Value | Tuning strategy |
| --- | --- | --- | --- |
| [cfn-signal wait condition data](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/cfn-signal.html) | The maximum amount of data that `cfn-signal` can pass. | 4,096 bytes | To pass a larger amount, send the data to an Amazon S3 bucket, and then use `cfn-signal` to pass the Amazon S3 URL to that bucket. |
| [Custom resource response](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-resource-cloudformation-customresource.html) | The maximum amount of data that a custom resource provider can pass. | 4,096 bytes | |
| [Dynamic references per template](dynamic-references.md) | The maximum number of dynamic references allowed in a single CloudFormation stack template. | 60 dynamic references in a stack template | |
| [Hooks per account](https://docs.aws.amazon.com/cloudformation-cli/latest/hooks-userguide/what-is-cloudformation-hooks.html) | The maximum number of Hooks allowed per account per Region. | 100 hooks | |
| [Hooks per resource](https://docs.aws.amazon.com/cloudformation-cli/latest/hooks-userguide/what-is-cloudformation-hooks.html) | The maximum number of Hooks that can be configured per resource. | 100 hooks | |
| [Hook configuration size](https://docs.aws.amazon.com/cloudformation-cli/latest/hooks-userguide/what-is-cloudformation-hooks.html) | The maximum amount of configuration data a Hook can store. | 204.8 KB | |
| [Mappings](mappings-section-structure.md) | The maximum number of mappings that you can declare in your CloudFormation template. | 200 mappings | To specify more mappings, separate your template into multiple templates by using, for example, [nested stacks](using-cfn-nested-stacks.md). |
| [Mapping attributes](mappings-section-structure.md) | The maximum number of mapping attributes for each mapping that you can declare in your CloudFormation template. | 200 attributes | To specify more mapping attributes, separate the attributes into multiple mappings. |
| [Mapping name and mapping attribute name](mappings-section-structure.md) | The maximum size of each mapping name. | 255 characters | |
| [Modules](modules.md) | The maximum number of modules you can register in the CloudFormation registry, per account and Region. | 100 modules | |
| [Module versions](modules.md) | The maximum number of versions you can register in the CloudFormation registry for a given module. | 100 versions | To register new versions, first use [DeregisterType](https://docs.aws.amazon.com/AWSCloudFormation/latest/APIReference/API_DeregisterType.html) to deregister versions you aren't using anymore. |
| [Nested stacks](using-cfn-nested-stacks.md) | The maximum number of CloudFormation resources a nested stack can create, update, or delete per operation. For example, you can have a nested stack hierarchy with more than 2500 total resources, but you can't create, update, or delete more than 2500 of those resources in a single deployment. | 2500 resources | Split the stack hierarchy into different stacks. |
| [Outputs](outputs-section-structure.md) | The maximum number of outputs that you can declare in your CloudFormation template. | 200 outputs | |
| [Output name](outputs-section-structure.md) | The maximum size of an output name. | 255 characters | |
| [Parameters](parameters-section-structure.md) | The maximum number of parameters that you can declare in your CloudFormation template. | 200 parameters | To specify more parameters, you can use mappings or lists in order to assign multiple values to a single parameter. |
| [Parameter name](parameters-section-structure.md) | The maximum size of a parameter name. | 255 characters | |
| [Parameter value](parameters-section-structure.md) | The maximum size of a parameter value. | 4,096 bytes | To use a larger parameterized value, create multiple parameters and then use the `Fn::Join` function to concatenate the multiple values into a single value. |
| [Private resources](registry.md) | The maximum number of private resources that you can register in the CloudFormation registry per account, per Region. | 50 private resources | |
| [Private resource versions](registry.md) | The maximum number of versions that you can register in the CloudFormation registry for a given private resource. | 50 private resources | To register new versions, first use [DeregisterType](https://docs.aws.amazon.com/AWSCloudFormation/latest/APIReference/API_DeregisterType.html) to deregister versions you aren't using anymore. |
| [Resources](resources-section-structure.md) | The maximum number of resources that you can declare in your CloudFormation template. | 500 resources | To specify more resources, separate your template into multiple templates by using, for example, [nested stacks](using-cfn-nested-stacks.md). |
| [Resources in concurrent stack operations](resources-section-structure.md) | The maximum number of resources you can have involved in stack operations (create, update, or delete operations) in your Region at a given time. | Use the [DescribeAccountLimits](https://docs.aws.amazon.com/AWSCloudFormation/latest/APIReference/API_DescribeAccountLimits.html) API to determine the current limit for an account in a specific Region. | |
| [Resource name](resources-section-structure.md) | The maximum size of a resource name. | 255 characters | |
| [Stacks](stacks.md) | The maximum number of CloudFormation stacks that you can create. | 2000 stacks | To create more stacks, delete stacks that you don't need or request an increase in the maximum number of stacks in your AWS account. For more information, see [AWS service quotas](https://docs.aws.amazon.com/general/latest/gr/aws_service_limits.html) in the *AWS General Reference*. |
| [Stack name](stacks.md) | The maximum size of a stack name. | 128 characters | |
| [StackSets](what-is-cfnstacksets.md) | The maximum number of CloudFormation stack sets you can create in your administrator account. | 1000 stack sets | To create more stack sets, delete stack sets that you don't need or request an increase in the maximum number of stack sets in your AWS account. For more information, see [AWS service quotas](https://docs.aws.amazon.com/general/latest/gr/aws_service_limits.html) in the *AWS General Reference*. |
| [Stack instances](what-is-cfnstacksets.md) | The maximum number of stack instances you can create per stack set. | 100,000 stack instances per stack set | To create more stack instances, delete stack instances that you don't need or request an increase in the maximum number of stack instances in your AWS account. For more information, see [AWS service quotas](https://docs.aws.amazon.com/general/latest/gr/aws_service_limits.html) in the *AWS General Reference*. |
| [StackSets instance operations](what-is-cfnstacksets.md) | The maximum number of stack instances, across all stack sets, that you can run operations on in each Region at the same time, per administrator account. | 10,000 operations | This limit applies across all stack sets involved in a Region. It includes stack instances affected by stack set creation and update operations, as well as creating, updating, or deleting stack instances directly. |
| StackSets queued operations | The maximum number of queued operations for a stack set at a given time. | 10,000 operations | |
| Stacks imported using S3 object per stack set operation | The maximum number of stacks you can import using S3 object per stack set operation. | 200 stacks | |
| Stacks imported using inline stack ids per stack set operation | The maximum number of stacks you can import using inline stack IDs per stack set operation. | 10 stacks | |
| [Template body size in a request](template-guide.md) | The maximum size of a template body that you can pass in a `CreateStack`, `UpdateStack`, or `ValidateTemplate` request. | 51,200 bytes | To use a larger template body, separate your template into multiple templates by using, for example, [nested stacks](using-cfn-nested-stacks.md). Or upload the template to an Amazon S3 bucket. |
| [Template body size in an Amazon S3 object](template-guide.md) | The maximum size of a template body that you can pass in an Amazon S3 object for a `CreateStack`, `UpdateStack`, `ValidateTemplate` request with an Amazon S3 template URL. | 1 MB | To use a larger template body, separate your template into multiple templates by using, for example, [nested stacks](using-cfn-nested-stacks.md). Or use minification to reduce the CloudFormation template size. |
| [Template description](template-description-structure.md) | The maximum size of a template description. | 1,024 bytes | |
| [Versions per hook](https://docs.aws.amazon.com/cloudformation-cli/latest/hooks-userguide/what-is-cloudformation-hooks.html) | The maximum number of versions you can create per Hook. | 100 versions | |
## Feature availability
Not all features of CloudFormation may be available in every Region. For more information about AWS Regions, see [Global infrastructure Region table](https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services/).
+ [Macros](template-macros.md) are currently not available in the following Region:
+ Asia Pacific (Jakarta)
+ [Performing ECS blue/green deployments through CodeDeploy using CloudFormation](blue-green.md) is currently not available in the following Regions:
+ Africa (Cape Town)
+ Asia Pacific (Osaka)
+ Europe (Milan)
## StackSets and macros
StackSets does not currently support creating or updating stack sets with service-managed permissions from templates that contain macros. This includes transforms, which are macros hosted by CloudFormation. For more information about macros, see [Template macros](template-macros.md).