I can't speak for this kitchen, but I believe the usual clearance is 3' on each side.

There are 33" between the sink and island, and 38" between island and fridge. One day long ago it was likely centered but has somehow migrated over the years. I don't really use the island for cooking at all, it's more a place where things get put down, and I always keep a big bowl of apples in the middle for snacks. I'm a pretty serious cook, so I spend most of my time in that corner between the range and the sink. It's a very practical size that works really well for me. The island is from Ikea.

@Sarah Dreyer, thanks for the details! It's nice to know you are a serious cook and the space of 33" is functional and not too tight. This is help in planning my kitchen re-do. Cheers.

Thanks for the response Sarah, we love the kitchen you designed for yourself! One of the things that you can't tell from the picture is how wonderful you counter tops feel!
:) Rhoda http://www.billfryconstruction.com/

Oh thanks! The countertops are actually slate, not granite. The material has proved to be a little fragile and I don't think I would recommend it o a client but I do love it despite its faults. It as such a nice soft look and it feels beautiful. It's not for everyone but I'm glad I have it.