Replacing and escape hatch.
Hey there, brand new to RVing, and bought a 1978 Chevy Country Cruiser. The escape hatch is quite old and disintegrating. I pulled the old one out and measured inside the hole, and it came to 14 1/2 x 21 5/8. The measurement of the bottom of the escape hatch that's fit into the hole is 14 x 21.
Does this mean I need a 14 x 21 hatch? Seems like most of them are like 13x20 or 15x22.
Thanks so much, not exactly sure which size I should be buying here.