I have the Red Snappers and the Mondo 3 pack looks like it would handle up to a 120" quilt. They are 40" each pc. and you get three pieces. They are very skinny but the really do grip and you do not put your batting between them. You need top and bottom for your backing and bottom for your front. You lay your batting, pin in a few places and the lay on your top and sew across with your vertical lock on. Take out the pins and you are ready to quilt. I go one step further, I sew from the top left side down as far as I can go and then do the same on the right side. It really makes a difference when you start quilting. Good Luck.