there is no perfect dimensions for an island. Try to organce space subdividing into smaller cabinets of 60x60 cms which is the max space for a structural division and works for seating area as well

You should be able to get everything that you want ........ Are you going to have a cabinet maker build it for you ? I suggest that you work with them and have them draw it up for you........Most cabinet makers are very good at working with their clients to get them what they want.

Hello Rola, You can go for a slightly bigger one upto 21 inches. See if you likes sinks with drain board. Thanks, Amit Cornerstone Designs Bangalore

too tiny kitchen for island. need to have accurate floor plan and water source for sink design along. foldable table might work better with counter wall in cabinets. island counter with ceiling hang chimneys if cook top here may save space OR simple counter table with utility below and just one wall touch kitchen platform so have a corner for other cabinet or fridge.