10" for an overhang will be a challenge to sit at comfortably. The allowance should be anywhere from 15 to 18" depending on the finished height. With that in mind combined with the fact that you already have a compact space, I would ditch the island seating altogether. Utilize the table that is right there and having better flow thru the room. PS: have you ordered the island counter as pictured? Is yes, you may want to rethink that and have it sized to fit the top only instead of keeping that 10" jutting out. Best of luck.

12" is the recommended overhang at 42" bar height seating where you sit with your feet on the stool rungs more so than spread out.

15" is the minimum recommended at 36" counter height seating, and I find that less than adequate with my long legs and tend to sit sideways, blocking more of the aisle. As does my 6'6'' 310 lb neighbor. A 4'0tall kid would be fine. Until that kid grows up to be as big as daddy in 3short years.

18" is recommended for table height seating. Or if you have someone taller and bigger than my neighbor at counter height. Yeah, it typically requires some steel. Most counter overhang are inadequately supported anyway by cabinetry sales people. The design a pretty island that fails the real world tasks of counter support integration into the design.

MIA standards are anything 3cm over 9" needs support every 24". 2cm is no more than 6" unsupported. I like steel in pretty much all situation as it can be invisible and you can do decorative as well if you want and not have to worry about anything cracking and killing the family dog.

I should clarify that the overhang as proposed would be supported although not shown in the renderings. Thanks everyone

Having a main traffic path through there should seal the deal. If the aisle is blocked by folks sitting, where is that traffic gonna go? Straight through your work zone is where.

Ditch the overhang entirely. Even saddle stools are deeper than 10" and won't fit under it even when there is no one sitting there.

make sure you can move furniture past the overhang when you move out or get a new fridge, furnace, whatever. other than that, its up to you. but don't have the counter top too far from those cabinets on the left or its an inconvenient couple extra steps each time.

There is ideal, and then there is not ideal, but what you want. We routinely manage to pass through 36, 30, and even 28 inch door spans. Yes a 12 inch stool will jut out a couple inches when tucked under a ten inch overhang, and leave you a bare 36 to pass.......however.......having done it, nobody killed them selves nobody tripped,, all managed to snack and sit. Depends I think if you are going to DINE. Do that at the table of course. But. There are instances where a thing can work on even limited dimensions. I never stated it was perfect, and frankly, 10 inches needs little support though you certainly can. If you feel too tight with kids, a dog, or whomever in a MAJOR and continuous flow of traffic? Welllll you know what to do. But optimum is just that, and doesn't mean every other option is wrong. I had same in a 1920 georgian colonial, same clearance in the galley kitchen and all "got by" in all senses and there were far worse issues in that kitchen than that one.........like no place for a breakfast table either and a bunch of teen friends and a lot of pizza for my client. You do what mostly works, most of the time.....for YOU: )

Thanks for your comments - much appreciated!