Facebook

Content Type	Character Limit
Facebook Ads – Headline	40 characters
Facebook Ads – Body text	125 characters
Facebook Ads – Link descriptions	30 characters (20 for carousel ads and in-stream video ads)
Facebook Posts	Up to 63,206 characters
Username	At least 5 characters and up to 50 characters
Page description	255 characters
Facebook comments	8,000 characters

Instagram

Content Type	Character Limit
Instagram Ads – Headline	40 characters
Instagram Ads – Body text	125 characters
Instagram Ads – Link descriptions	30 characters
Instagram Captions	2,200 characters (truncated at 125 characters)
Instagram Hashtags	Up to 30 hashtags (1-10 hashtags tend to drive more interactions)
Bio	150 characters
Username	30 characters

Twitter

Content Type	Character Limit
Tweets	Up to 280 characters
DMs	10,000 characters
Profile name	50 characters
Bio	160 characters
Twitter handle	15 characters

Pinterest

Content Type	Character Limit
Maximum number of Pinterest boards	2,000
Maximum number of Pins	200,000
Profile name	30 characters
Bio	160 characters
Username	30 characters
Board name	50 characters
Board description	500 characters
Pin title	100 characters
Pin description	500 characters

LinkedIn

Content Type	Character Limit
First name	20 characters
Last name	40 characters
Status update (personal profile)	1,300 characters
About us/Summary	2,000 characters
Company Page name	100 characters
Company update	700 characters
Company leaders headline	150 characters
Company leaders description	150 characters
Employee testimonials	400 characters
Title of custom module	150 characters
Body of custom module	500 characters
URL label for custom module	70 characters
Recommendation	3,000 characters
LinkedIn Publishing post headline	100 characters
LinkedIn Publishing content length	Up to 110,000 characters

YouTube

Content Type	Character Limit
Video title	100 characters
YouTube description	5,000 characters
Playlist titles	150 characters
YouTube tags	500 characters total