This is Mark Murdock’s Custom Canopy for made to fit Steve Shumate's 100% Polaris Seaplane Parkflyer. chances are it will fit the XL as well.
The canopy is formed with .030 clear PETG plastic and has been painted silver so it would photograph better. They are sent out clear, don't laugh I get asked from time to time.
Actual canopy size not includeing the flange:
10 1/2 inch long 2 inch wide 2 inch tall
RC groups.com link