IMO island lighting should light the island not the ceiling and as for size of course that depends on many things including the fixture . In my head I see no reason to not go a bit larger but your island in very narrow so think about that since 17" visually takes up a lot of space above a narrow island. But IMO the wrong fixture .

I disagree with him, most new kitchen will have recessed lighting which is enough for lighting up for space. Pendant lighting is not only functional also a decorative piece like jewel for your kitchen.

I think medium will be great, for length of the island. I got large fancy darlana lanterns for my kitchen which I think they are too big for my island.but I stocked with them since I can not return them after installation.

@Lisa Liming Huang, what is the length of your island? I love those pendants and did you get the medium?

@telesaps, I have not place the order yet. My island is 111 inches long.