Theres a small gap between the backsplash and cupboards, the gap is too small to cut strips of backsplash to Make it look normal. I have run out of ideas. Any of you pros got any ideas?
The grout lines in the mosaic tile look like 1/8" is that right?
If that's the case you need to space the tiles up off the counter using 1/8" spacers. They shouldn't be directly on the counter as shown in your picture where you're just holding it. When grouting don't grout that area. Use a silicon caulk that matches your grout instead.
That leaves 1/4" grout line between the top of the tile and the bottom of the cupboard which isn't ideal but shouldn't really be noticeable at that spot. That covers the 3/8" gap.
Or you can split the difference and do a 3/16" on top and bottom. May even want to try a black caulk for the top so you don't notice it against the black cabinets.
First the tile would not be installed right on top of the counter. You would need the same grout gap as the tile has guessing 1/8" - 1/16" would be the closest. So your gap isn't even that big.
I would not rip this tile with a saw. I have used this before and it doesn't rip or cut well.
If it were my house I would go to the tile store and find a mosaic that comes in very thin strips and use it along the top or bottom or both. It is quite likely you only need a sheet or two to make this happen it it will keep you from having to make tons of hard cuts.
Good tiling is more about math/planning than cutting.