the largest quilt i have quilted on my hq-16 was 116"x120" , i don't think it has anything to do with the machine, it has to do with how large your table is you are set up on...my table is 14 feet long. the room it is in is too small, the table is angled from corner to corner with just enough space for me to get around one end. someday i will have a big enough room for it, but it works fine, and with local tech support and available classes i think you are looking at a great investment!