I've always done bar sized faucets for the auxiliary sink. I've just picked the Delta Trinsic faucets â¦. love them.

We just went through this conundrum last week when we finally started to put our island together. The faucet I had bought a year ago for our island sink turned out to be too big once we saw it in place. It wasn't the height that bothered me. Rather, it was the depth front to back from the sprayer to where the faucet pipe came up from the sink. We could tell that had we installed it, water would have gone all over our shirt fronts rather than in the sink! We needed a faucet with a much tighter arc to it.

We were very thankful to find another faucet on clearance at Home Depot that has a tighter arc. It's the Avanti F-529-7ANY by Pfister. Our sink is a Franke with only 2 holes. The Avanti faucet we works with that configuration and has a pull-down sprayer, which was high on my wants list. I can't speak to the longevity of it, but it's working very well for us right now. : )

Here is a link that might be useful: Avanti Faucet at Home Depot

We went with a standard size faucet on our 16" round prep sink. Any smaller would have looked odd. The faucet is 17"H.

I think the proportion of sink size to faucet size is the most important factor with island size secondary.