# Guidelines and quotas in Amazon Rekognition Custom Labels
Guidelines and quotas

The following sections provide guidelines and quotas when using Amazon Rekognition Custom Labels.

## Supported Regions


For a list of AWS Regions where Amazon Rekognition Custom Labels is available, see [AWS Regions and Endpoints](https://docs.aws.amazon.com/general/latest/gr/rekognition.html) in the *Amazon Web Services General Reference*.

## Quotas


The following is a list of limits in Amazon Rekognition Custom Labels. For information about limits you can change, see [AWS Service Limits](https://docs.aws.amazon.com/general/latest/gr/rekognition.html). To change a limit, see [Create Case](https://console.aws.amazon.com/support/v1#/case/create?issueType=service-limit-increase).

### Training

+ Supported file formats are PNG and JPEG image formats. 
+ Maximum number of training datasets in a version of a model is 1. 
+ Maximum dataset manifest file size is 1 GB. 
+ Minimum number of unique labels per Objects, Scenes, and Concepts (classification) dataset is 2.
+ Minimum number of unique labels per Object Location (detection) dataset is 1.
+ Maximum number of unique labels per manifest is 250.
+ Minimum number of images per label is 1. 
+ Maximum number of images per Object Location (detection) dataset is 250,000.

  The limit for *Asia Pacific (Mumbai)* and *Europe (London)* AWS Regions is 28,000 images. 
+ Maximum number of images per Objects, Scenes, and Concepts (classification) dataset is 500,000. The default is 250,000. To request an increase, see [Create Case](https://console.aws.amazon.com/support/v1#/case/create?issueType=service-limit-increase). 

  The limit for *Asia Pacific (Mumbai)* and *Europe (London)* AWS Regions is 28,000 images. You can't request a limit increase. 
+ Maximum number of labels per image is 50.
+ Minimum number of bounding boxes in an image is 0.
+ Maximum number of bounding boxes in an image is 50.
+ Minimum image dimension of image file in an Amazon S3 bucket is 64 pixels x 64 pixels.
+ Maximum image dimension of image file in an Amazon S3 bucket is 4096 pixels x 4096 pixels.
+ Maximum file size for an image in an Amazon S3 bucket is 15 MB.
+ Maximum image aspect ratio is 20:1.

### Testing

+ Maximum number of testing datasets in a version of a model is 1. 
+ Maximum dataset manifest file size is 1 GB. 
+ Minimum number of unique labels per Objects, Scenes, and Concepts (classification) dataset is 2.
+ Minimum number of unique labels per Object Location (detection) dataset is 1.
+ Maximum number of unique labels per dataset is 250.
+ Minimum number of images per label is 0. 
+ Maximum number of images per label is 1000. 
+ Maximum number of images per Object Location (detection) dataset is 250,000.

  The limit for *Asia Pacific (Mumbai)* and *Europe (London)* AWS Regions is 7,000 images. 
+ Maximum number of images per Objects, Scenes, and Concepts (classification) dataset is 500,000. The default is 250,000. To request an increase, see [Create Case](https://console.aws.amazon.com/support/v1#/case/create?issueType=service-limit-increase). 

  The limit for *Asia Pacific (Mumbai)* and *Europe (London)* AWS Regions is 7,000 images. You can't request a limit increase. 
+ Minimum number of labels per image per manifest is 0.
+ Maximum number of labels per image per manifest is 50.
+ Minimum number of bounding boxes in an image per manifest is 0.
+ Maximum number of bounding boxes in an image per manifest is 50.
+ Minimum image dimension of an image file in an Amazon S3 bucket is 64 pixels x 64 pixels.
+ Maximum image dimension of an image file in an Amazon S3 bucket is 4096 pixels x 4096 pixels.
+ Maximum file size for an image in an Amazon S3 bucket is 15 MB.
+ Supported file formats are PNG and JPEG image formats. 
+ Maximum image aspect ratio is 20:1.

### Detection

+ Maximum size of images passed as raw bytes is 4 MB.
+ Maximum file size for an image in an Amazon S3 bucket is 15 MB.
+ Minimum image dimension of an input image file (stored in an Amazon S3 bucket or supplied as image bytes) is 64 pixels x 64 pixels.
+ Maximum image dimension of an input image file (stored in an Amazon S3 or supplied as image bytes) is 4096 pixels x 4096 pixels.
+ Supported file formats are PNG and JPEG image formats. 
+ Maximum image aspect ratio is 20:1.

### Model copying

+ The maximum number of project policies that you can [attach](md-attach-project-policy.md) to a project is 5.
+ The maximum number of concurrent copy jobs in a destination is 5.