Text Card
- 640 character limit
- supports UTF-8
Gallery Card
- up to 10 items in one card
- horizontal image aspect ratio is 1.91:1 and square image aspect ratio is 1:1
- item title has an 80 character limit
- item subtitle has an 80 character limit
- optional buttons are limited to 3 per item
Image Card
- jpg, png, gif
- for best results keep the number of frames for dynamic GIFs below 75
Video
- mp4
- max. 25 MB after Facebook's transcoding
Audio
- mp3, wav, ogg
- max. 25 MB after Facebook's transcoding
Buttons
- 20 character limit
- can link to block, URL, phone number, buy and share functionality
Quick Replies
- up to 11 items per quick reply
- item title has a 20 character limit
- can link to block
Persistent Menu
- up to 3 top level menus
- menu title has a 30 character limit
- can link to block, URL or sub-level menu