Poster Styles and Display Modes: Optimizing Image Sizes


This Instant TV Channel Help article applies only to Developer SDK Roku channels. Direct Publisher Roku channels have a single poster size of 800x450.

Posters are the png, jpg, or gif images that are used to select a video or audio content item from a list, and that are displayed in the Springboard (a.k.a. Detail) screen prior to playing the content. Whenever possible it is important to create posters that are the exact size required by the Roku player in order to minimize channel load times and memory use, and to use non-SSL URLs.

  • Posters that are too large will cause the channel to take a long time to start up and the channel will behave sluggishly when the remote keys are pressed.
  • Posters that are too small may appear blurry and unreadable.
  • Posters that are accessed using SSL URLs (https://) will load slower, and cause significant startup delays for channels with large content lists.
  • Using the recommended poster size may improve the performance of channels on older or slower Roku devices, but for channels containing a relatively small number of posters using a standard poster size of 800x450 instead of the recommended siae will usually achieve acceptable results.

The PosterStyle and ListStyle options are pre-defined poster sizes that are used in specific Roku screens. Not all styles are available in every screen.

The DisplayMode and ListDisplayMode options determine how a poster image is scaled and/or cropped to fit into the rectangle specified by the selected PosterStyle or ListStyle option.

The sizes shown in the tables below are width x height in pixels.

PosterStyle Options for Springboard/Detail Screens
PosterStyle Recommended Size Description
multiple-portrait-generic 142x202 Tall poster style.
rounded-rect-16x9-generic 269x152 16x9 poster style.
rounded-square-generic 209x209 Square poster style.
default (audio) 188x188 Only available if ContentType is audio. Required for display of audio progress bar.
default (episode) 264x198 Only available if ContentType is episode.
default (movie, season, or series) 148x212 Only available if ContentType is movie, season, or series.

ListStyle Options for Horizontal Lists, Series, and MRSS Feeds
ListStyle Recommended Size Description
arced-16x9 385x218 Arced list of poster art displayed in 16x9 aspect ratio.
arced-landscape 290x218 Arced list of poster art displayed in landscape (wide) style for 4:3 aspect ratio TV shows.
arced-portrait 214x306 Arced list of poster art displayed in portrait (tall) style for DVDs or Movies.
arced-square 300x300 Arced list of poster art displayed in a square frame style.
flat-category 304x237 Flat (non-arced) list of categories. This ListStyle is often used for a channel's top level menu screen.
flat-episodic 224x168 Flat (non-arced) list of episodes for series content such as a TV show.
flat-episodic-16x9 250x141 Flat (non-arced) list of episodes displayed in 16x9 aspect ratio for series content such as a TV show.

ListStyle Options for Vertical Lists
ListStyle Recommended Size Description
vertical-poster 250x250 Poster art displayed on the right side of a Vertical List screen. Does not have a ListDisplayMode.
vertical-background Variable Typically this is a full screen image, less the height of the overhang. The image is aligned to top-right corner of the screen beneath the overhang. Transparency is supported. Does not have a ListDisplayMode.

ListStyle Options for Grids
ListStyle Recommended Size Description
flat-16x9 210x118 Grid of poster art displayed in 16x9 aspect ratio. HD grid has 5 posters across by 3 rows, SD grid has 4 posters across by 3 rows.
flat-landscape 210x158 Grid of poster art displayed in landscape (wide) style for 4:3 aspect ratio TV shows. HD grid has 5 posters across by 3 rows, SD grid has 4 posters across by 3 rows.
flat-movie 210x270 Grid of DVD/Movie poster art as seen in the original Netflix channel. Both HD and SD grids have 5 posters across by 2 rows.
flat-portrait 210x300 Grid of poster art displayed in portrait (tall) style for DVDs and Movies. Both HD and SD grids have 5 posters across by 2 rows.
flat-square 132x132 Grid of poster art displayed in a square frame style. HD grid has 7 posters across by 3 rows, SD grid has 6 posters across by 3 rows.
two-row-flat-landscape-custom 266x150 Grid of poster art displayed in 16x9 aspect ratio. HD grid has 4 posters across by 2 rows, SD grid has 4 posters across by 2.5 rows.
four-column-flat-landscape 210x118 Grid of poster art displayed in 16x9 aspect ratio. HD grid has 4 posters across by 3 rows, SD grid has 4 posters across by 3.5 rows.

If variable sized posters or poster size multipliers are used in a Grid Row, then the Descriptions in the table above may be different.


For more information about how to easily create a Roku channel using Instant TV Channel, please see this Walk-Through.

Questions and comments about this Roku developer guide can be sent to .

Instant TV Channel is a cloud-based tool for Roku developers and content providers that shortens development time and eases maintenance after deployment.



Access Code: GRID3
Check out Instant TV Channel by adding our demonstration channel to your Roku player, or watch the YouTube video.

Need help with your Roku?

We are unable to provide technical support for your Roku device.

Please visit www.roku.com for assistance.



Instant TV Channel is not affiliated with nor endorsed by Roku Inc.