What's the maximum length a pre-order cart label can be? Norton Chris June 06, 2018 00:43 Follow Pre-order cart labels can be up to several paragraphs in length, however we recommend keeping them as short as possible. Related articles Show pre-order buttons when inventory is at or below 0 How do I change the style, color and appearance of the pre-order buttons? How do I get the pre-order cart label to appear on shipping labels? Comments 0 comments Article is closed for comments.