I am not a 4Runner owner, and this current cover exists because I made a cover for my 3IS Lexus, which to me looked to be exactly the same cover as the 5th gen 4Runner, so I shared my work here for others.

What I did not know at that time, was that it was the 2020 4Runner cover that I had seen, and it happens to be different than previous years, so my provided 3IS cover did not work. I then felt bad providing a non-working cover, so with @ElectroBoy 's provided measurements, I modeled up a cover that worked for the 2010-19 4Runners.

This still leaves me with the original 3IS cover that I believed to be the same as the 2020 4Runner, but have yet been able to verify. If you would like to try this cover, so we can verify the fitment, go ahead and message me and we will figure it out.