If the inside of your screen is 24.5 inches then the 24 inch screen defender # LC25FR is too small and the 26 inch # LC52FR is too big. The widths are only those even numbers but there is adjustment integrated into the design with extrusions for the vertical differences.
My recommendation for your screen door width is the Camco RV Adjustable Screen Door Deluxe Grille - Black # CAM43993 ( # CAM43991 in aluminum) or the Camco RV Adjustable Screen Door Push Bar - Aluminum # CAM43971. ... view full answer...