Barb in Louisiana

One think to keep in mind is that increasing the size of any block pattern is better if you do it in multiples of the original size pattern. For instance, a 6 inch block can more easily be increased to any multiple of 3 because this is the lowest divisible measurement. So 3, 6, 9, 12, 15. 18, etc is good. Going from 6 to 10 creates some really funky cutting measurements. A 4 inch block is easily divided by 2, making possible blocks 2, 4, 6, 8, 10, etc. Ironically, if you are changing an 8 inch block, then your sizes would be 4, 8, 12, 16. A 10 inch block would be multiples of 5. Now there are always exceptions to every rule, whether you are quilting or whatever.

Second item. What I like about your pattern is that it is very balanced. If you want to upsize it, making a larger block is the easiest way to do it. The pattern is an 8x8 grid which is 8x6=48" square. If you upsize it to a 9 inch block, that would be 9x8=72 inch square. A queen bed is typically 68x78 inches, so this would just cover the top of the bed. If you upsize the block to 12 inches, then 8x12= 96 inches square. This might be the size you want.

Another option would be to keep the block as a 6 inch block and add another pattern to both the width and the length. You would need a 12x12 grid. So, 12x6=72. Once again, not big enough. Upsizing to 9 inch blocks will give you 9x12= 96. Now you are back to the original grid but could use the 12 inch block and not have to make as many.

I like borders on my quilts, so I would probably make the 9 inch blocks which results in a 72 inch square and add borders to upsize to the size I want.