That depends on the template you've chosen. Each template features a unique design and layout, so the number of characters per line is different for every online template. Don't worry; it's easy to tell whether or not your text fits on the template. Just enter all your information into the ticket template and then click %22View Proof%22 at the bottom of the page. If your text doesn't fit, any lines with too many characters will appear in red on your proof. From there, you can go back to the template and make it work: either shorten the line or try to break it up in two lines, if the template layout allows for that. Remember that capital letters need more space than lower case letters, and vertical layouts usually allow for less text than horizontal layouts.