'Export for screens' mess up the dimension

[StrangeDesign]

I'm exporting a bunch of icons made in Illustrator and thought the 'Export for screens' option would save the day but unfortunately, I can't make it export it in the right size

I went through the document several times and checked every single artboard. They're all set to a precise size (in this case 166 x 166 pixels) yet when I export them, they suddenly become 167x167 pixels instead.

I've tried to solve this for hours to no avail. I know it's not a big difference; it's entirely because the function is unreliable and I wanted to know if anyone might have solved this problem

[Doug A Roberts]

are your artboards sitting perfectly on the pixel grid? any offset could cause antialiased edges that may account for extra pixels. have a close up look with Pixel Preview turned on to be sure.

here's one artboard on and one artboard off the grid. they're both 50x50 px, but anti-aliasing causes the right hand one to export as 51x51:

[StrangeDesign]

I am afraid that wasn't the solution. I tried to align a couple of them with the grid but they still grow 1 px in size regardless of the placement in the grid

[Doug A Roberts]

can you see antialiased edges with pixel preview on? or do they look nice and clean?

[Ton Frederiks]

Do you have a stroke around your icons?