We also sell David Dunleavy shirts in our scuba center, and they do have up to 6XL in some shirts, I can check because they not only have larger sizes but also use made in USA shirts, now they use a heavier shirt, and it isn't inexpensive, but it is very high quality and wear great. We have discovered that the it really is better to purchase shirts separately and then have them printed, rather then let the printer supply the shirts, unless you know what shirts the printer uses.