Smallest case for a Nikon 750D

I have a Nikon 750 (usually use with 28mm lens) and need a waterproof case. I don’t plan to take pictures in the water, need it mainly for protection. please let me know which is the smallest acceptable size.
Hello and thank you for your enquiry.
The perfect size for Nikon D750 with 28mm lens, is our 458-DSLR Camera Case. Just to make sure I checked the right lens, is it the Nikon AF-S Nikkor 28mm f/1.8G?
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