# ThreeDSChallengeWindowSize

A model the API reference uses in a request or a response. The operation pages link every field typed as this model here.

Normalized form of the EMVCo `challengeWindowSize` field: the dimensions of the iframe the
requestor will host the ACS challenge in.

## Values

| Value | Description |
| --- | --- |
| `Size250X400` | Wire value 01: 250 x 400. |
| `Size390X400` | Wire value 02: 390 x 400. |
| `Size500X600` | Wire value 03: 500 x 600. |
| `Size600X400` | Wire value 04: 600 x 400. |
| `FullScreen` | Wire value 05: full screen. |

## See also

- [All documentation](https://devportal.signapay-sbx.winkpg.io/llms.txt): the machine-readable index of every public page on this site.