That is a bad proprtion for an island so I agree either shorten it or live with a seam IMO if you only have space for 36” wide maybe an island is not the best choice but that one is not good.

I’m sorry but a 36 x 140 island is going to look like a landing strip. And no it’s not possible to get a slab that long.

I checked everywhere when we were looking for quartz for our 12ft island. I ended up making the island a bit shorter (10.5ft) and used a jumbo slab.

I would sacrifice the 8 inches, personally. If space allows, widen it some to balance it. Seems fairly narrow for that kind of length. I would not want a seam either, especially if it was just to get an extra 8 inches of length. Just not worth it.

Show us the floor plan ( cabinet and appliance layout. That's not a good proportion, and no......you won't find it. In any quartx or any other material.

These are the quality of seams possible in engineered stone these days; close to solid surface quality. Pick an estone without movement and they'll nearly disappear.

That size island is too great an obstacle to walk around in a kitchen The island size should be based on kitchen function, not the number of bar stools someone thinks they require.

Unlike the others, I actually have an island that size and absolutely love it. Not one regret. The top is 38.5" x 140 with two seats and does not look like a landing strip. I thought about cutting the island to avoid a seam but didn't want to give up the drawers that I had planned. Old island was 42" x 102". So glad that we added the extra length - very handy for entertaining which we do often. I am 5'3" so I can easily wipe it down from one side and there is enough room for two people to work across from each other. I just told my DH that I would do it exactly the same if we build our next home. I used quartzite and a very skilled fabricator. Seam is through the prep sink and is barely noticeable. The long side faces our range top and ovens so I've got the prep sink, prep tools, spices, pullout trash, chef's drawer and baking drawer right where I need them. If it fits your space go for it.

Wow you guys are harsh! Looks like our best option is to remove 8". I dont want a seam if I can avoid it. Thanks!

Mary, wilson853 just told you how to minimize the seam. But remember you will be purchasing more than one slab if you make the island larger than the length of the slab and depending on the fabricator that could mean lots more $$$

Even at 132" you have to leave them enough to cut and finish the edges. Unfortunately there is nothing I know of that will not have a seam at that size. Depending on the material and pattern the seam may be more or less visible. Otherwise you only option is to speak with the fabricator and ask what the largest FINISHED length you can get and design your island accordingly.

You could also consider 2 tops - I did that with a client of mine where we had the very long island

Good luck!

Mary, not everyone is being harsh. Focus on the helpful advise and let the rest go. A lot of people here have tried to offer some opinions or own experiences to help with your question .

You need to subtract around 2"-3" for the usability of a natural stone slab. They usually aren't square, and the edges are jagged. For quartz, allow for 1" of the edging to be cut off, unless there was shipping damage. Overhangs are a standard 1 1/2" over cabinets. You have to factor that in as well. Then there is the route into the house and into the kitchen. It does no good if you get everything within the slab's dimensions, if it won't fit through the house. Think of this as a pool table or piano. What route is something that big going to have to take? Corners to go around? Or direct access from the driveway and no turns?

Your KD should be helping you with this math, and should have warned you about the consequences of choosing to create something outside the usable dimensions of the material. Where are they? Why aren't they helping you?

I don't want to sacrifice those 8" (plus whatever is needed for edges?) - what should I do if I don't want a seam?

Late to the posting, not sure why I didn't catch it, but I know EXACTLY how you feel! In our new build I have a 4'x12.5' island planned and have been fretting over the seam. I researched stone spans before designing that size and knew what I was getting into.

There is no way around not having a seam if your island is one-level. I even considered having a split level island to avoid the dreaded seam. But, after scouring through (sooo many) seam pictures and installed counters, I've decided that if I want my long one-level island, it's going to have a seam. It will be a bookmatch seam, and I'm excited for the extra 2.5' of length (current island is 3'x10'). Now, I have to pick between my countertop choices... (The decisions keep piling up, and I'll be so happy to be done. Lol)

Good luck coming to terms with your seam!

Bookmatch is the luck of Mother Earth.............just saying : )

Hey everyone calm down, my island is huge so? We aren"t dancing in my kitchen we cook!

And yet theres more, I love all the new counters you showen, there awesome!

"For quartz, allow for 1" of the edging to be cut off, unless there was shipping damage."

If a quartz manufacturer says you'll get 56" x 120", that's what you'll get. I've seen useable slabs at 121", but that extra inch is a gift, so don't count on it.

@Joseph Corlett, LLC I have just finished a design of the island and it is 56.5” wide. sadly the 2 cm Caesarstone quartz I had been leaning towards show a wide of the same..and no jumbo slab listed as being available. Just confirming that what you have said above that typically the measurement given by the manufacturer are the max width. a local fabricator told me that the stated is generally the max usable countertop. wondered if you have seen otherwise with Casearstone products. thanks, appreciate your input!

Anything additional you get is a gift.