Google Glass Timeline item actions: What are the icon dimensions?

Question

What are the native image dimensions of the icons specified in 'iconUrl' for a custom timeline item action?

This doesn't appear to be documented yet.

Answer 1

The menuItems's icon should be 50 x 50 pixels and white on transparent according to our documentation on UI Guidelines:

Follow these guidelines when designing your menus:

• If you specify an icon, use a 50x50 pixel image.
• Limit display names to a few words if possible.
• Use the default icon and display name for built-in menu items unless you are using the menu item for something very different.

Answer 2

Here is a brief list of the specs to guide your development:

Screen aspect ratio
    16x9
Screen resolution
    640 x 360 pixels
Share contact icon size
    640 x 360 pixels
Menu option icon size
    50 x 50 pixels
Supported media format
    Container: MP4
    Video: H.264 baseline and H.263 baseline
    Audio: AAC and MP3

source

Answer 3

This is the default css stylesheet used by the timecards :

https://mirror-api-playground.appspot.com/assets/css/base_style.css

It contains the dimensions of all the elements that can be used in the timecard.