New messages, automated-responses, and Inbox replies can be up to 459 characters long (letters and numbers). The character count below the message body shows the length of the message.
Messages less than 161 characters use 1 message credit per Subscriber.
Messages between 161-306 characters use 2 messages credits per Subscriber.
Messages between 307-459 characters use 3 message credits per Subscriber.
If your message exceeds 160 characters you will see a pop up message informing you that your message will use more credits.
Messages that include special characters like Emojis or accented characters will be limited to fewer characters. Click here for details on sending a message with special characters.