I used 3mm and it was perfect. Reasonably light so I didn't need loads of tape and not too thin that it would snap.
Cut to size and deliver for just over a tenner? You are just wanting a basic square shape yes?
Yeah, Sizes sounds about right. My 902 window was about 400mm tall so those look like they'll add up.i took the dimensions off tj's info in youtube, im assuming the dimensions he stated are the dims for the acrylic
342.9mm x 508mm, which is the conversion of his inch dimensions of 13.5 x 20
£4.43 + £8 p and p