Front Hatch Specs for screen fitting

[PK]

I am looking to install the screen trim kit from Lewmar on the front hatch.  Problem is I can't seem to figure out what the dimensions/size of the front hatch are. Can someone help me out with a size number or reference to the hatch and/or screen trim kit.  It is on a '95, and is the Lewmar trapezoidal shaped hatch.  Thanks