It comes in crib size but you can extend it with pvc pipe.
Just remember it takes up the whole length on one side of your machine so gets very hard to handle. The rollers have a tendency to fall off the table if your not adjusting them as you go.
I have one but dont like it much. Fine for crib size but not any bigger than that. Waste of money. Doing small quilts is easy just with your sewing machine so why bother.