Valve Cover Bolt Size help. please.

[06YarisRS]

I was inspecting behind my engine to see if I have any visible exhaust manifold leaks and noticed I'm missing one valve cover bolt. There is a small oil leak where the bolt is missing.

Does anyone know the specs on this bolt so that I can replace it? I am still planning removing the valve cover, but will need a bolt anyway.

EDIT: The bolt appears to be part Toyota 91511-C0622, but rather than order and wait for one. I'd like to try to match locally without having to remve another one.

Thanks in advance.

[06YarisRS]

Nevermind. I took another one out and found a similar - though slightly longer bolt in our bolt bin. Length didn't matter as the holes in the head are drilled and threaded right through.