I’m considering purchasing the GXT-800’s to use while sailing and even though their waterproof I would like to get a waterproof case / bag for them. This will further protect them as well as keeping them afloat if it goes overboard. I am unable to find the dimensions even on Midland’s web site.
Thanks Tony
Tony,
I can’t find “official” dimensions anywhere either for the GXT800. I just measured one myself, so here my “unofficial” measurements 
Height (to base of antenna): 4 3/4"
Height (including antenna): 8"
Width: 2 1/2"
Depth (doesn’t include belt clip): 1 1/2"
Keep in mind this would apply to the GXT850 as well.
Danny
Thank you!