The Van Ness Litter Pan XGiant Drawstring Liners fits pans with dimensions up to 22"x18".  This includes the Van Ness pan listed as "XLarge" on this site.  (The XLarge enclosed pan.)  This is a 6-pack.

• Extra-giant drawstring liner
• Made from 65% recycled plastic
• 3-ply, no tear technology
• Fits pans measuring up to 22”x18”