Can you take another pic, closer to the sink?

He said he can expand the sink with clamps? I do not know what that means because you always need to use clamps when installing an undermount sink.

They did a great job matching the veins in the countertop. I love how one comes from the right of the sink and appears to continue on the island.

@Absolute kitchen & granite

@WW Water & Wellness

He said he will put clamps from inside of the sink and widen it little.

It's hard for me to notice it. - If it's totally off center it might have to be re-done then.

@auntthelma yes they did a great job matching the veins .And also they put seams at the center of the sink and one at center of the cook top. so I have only 2" and 3" long seams. None running the entire width of the sink .I am happy about that.

I would think about how much money you have put into that kitchen. It needs to be RIGHT. Send it back.

I'm confused about how the counter can be in place with no sink...

Hard to judge without seeing. I honestly can't see the unevenness in the hole by itself -- I'd say if the reveal can be made approximately even all the way around, I wouldn't change anything. In the long run you won't notice it anymore, and they really got most of the big stuff right.

But there do appear to be some cut marks at the corners of the sink hole -- is that some kind of chalk markings, or did they gouge something when cutting? In what way is the hole off-perfect?

Those are chalkmarks. I made them remove the sink and ask them to fix the cut out. right side of the cutout is smaller than the left side by 1/16' of an inch

Here are the pics with sink

I would have them replace. Clamps can't bend the center where the metal goes across between sinks. You paid to have it look just right.

The sink cannot be expanded with clamps. Live with what you have, or have him cut the hole larger and square for a minimal positive reveal.

Your fabricator made a mistake alright, in picking a customer that would complain about a 1/16" on a sink cut-out. We're building kitchens here, not space telescopes.

The finishes are STUNNING - everything looks to be done to a VERY high standard. Seams are minimal and veins are PERFECTLY aligned. Two of the MAJOR complaints people have have been dealt with BEAUTIFULLY by your fabricator.

My question becomes: Are you WILLING to destroy ALL THAT perfection (all of it) for 1/16" at a sink cut that is invisible to the casual observer? Are you willing to have the cure (the recut) worse than the disease? If they get the cut WRONG (you have a 50:50 chance of this) then they need a whole new slab. And all that perfection goes out the window (or down the drain...whichever way you want to put it)! All of it. And imagine the next slab is not as perfect as this one (perhaps the veining or the colouring are not as nice as this). Imagine the heart ache.

All of that for 1/16" that is almost invisible. As Sophie so eloquently states, this is within tolerance and will become invisible the more you use your kitchen. In 5 months you won't even remember the issue.

Remember: The cure could be worse than the disease. Right now you are 1/16" away from PERFECTION. I wouldn't mess with that.