Usually, one SMS credit counts towards a message up to 160 characters. However this can vary depending on the type of characters used, e.g. emojis or accented characters. SMS messages can be longer than 160 characters, however you will be billed per segment. Be sure to pay attention to Textla's segment counter when crafting your SMS messages:
SMS messages (texts with no files attached) deduct credit per segment. Learn more about how credits work here!
*Segments do not apply on MMS messages, which allow up to 1,600 characters.*