My longarm (Rosey) is on a 12 foot frame which means she can accommodate most quilt sizes. Remember that your backing needs to be 4" larger all around than your top. Keeping that in mind, the largest backing that I can put on my frame is 130". That means one side of your backing needs to be smaller than 130". And one side of the top can be up to 122". The longer side will get rolled up and can be as long as you like.