Sunglasses for a big head

[Anchovies12]

Just wondering if anyone has a recommendation - I've tried on so many and none look right on my big round head!!

Don't mind splashing out as I am sick of trying to find the perfect pair!

I have a bigger than average head (see my latest thread on sunhats for big heads!) and I have a lovely pair of Coach sunglasses. I bought them years ago but they are similar to these:
Coach

Thanks Acer (and I also need a sunhat so double bonus!)

Ray Bans - my DH uses them as he has real trouble finding frames big enough ( he even uses the frames for prescription glasses)