Consider the work aisles (from stove to sink) and the walkways (moving people through the kitchen to other rooms); you may want to alter the widths on either side of the island. The width of a kitchen island involves many factors, but again, starting with the standards, the general rule is between 2’ and 4’ wide. The 2’ minimum is really only used when space is at a premium (it would fit one 24” base cabinet) and a 3’ width is a bit more workable. You also don’t want it too wide that you get a no-man’s land area in the middle that becomes hard to reach.