I found that the best thing to help me decide lighting size was to mock it up in the space. I used a combination of string, paper plates, masking tape, and whatever else I could find to best represent the fixtures I was considering. 26", the size of the 2nd fixture, would normally seem a little large for a table of that size, but since it's spherical, and with the small scale and transparency of the glass parts, it has less visual weight than something that is darker and more solid, so may work anyway.

Is this new construction or a gut-remodel so that you still have a choice of how many lights to put over the island? It partly depends on the other lighting you have in the room, but it seems like a mini chandelier could be nice. It's personal opinion, but I feel like 1 pendant, unless it's good-sized, looks kind of spindly and lonely, and it seems like 2 would be too much for the 3x4 island.

Here's some info that may help you determine size of light:

Here is a link that might be useful: decorating studio

The general rule of thumb is that a pendant or chandelier hanging over a table should be about 12 inches narrower than the table on all sides.

As far as how high you should hang the light:

For your kitchen table, make sure the light is not in your line of vision when you are seated. This typically amounts to about 36 to 40 inches above the counter.

The same rule applies for the island unless you don't have chairs or bar stools around the island. In that case, the light should be hung about 30 inches above the counter. This will provide adequate lighting for chopping and reading recipes. The general rule here is to think about where the light will hang in relation to your height. You donÂt want to reach across the counter and be hit in the head! Most islands are about three feet tall, so an extra 30 inches would place the light at five feet six inches. If youÂre much taller and will be working at the island, youÂll want to tweak the height of the pendant light accordingly.

Good luck!