So it has basically been an awful year from a hobby perspective for me.

Anyway; find attached Isoblock catalogue. It's basically 25 blocks; 1² through 5², each at 1 through 5 blocks tall.

The range currently covers six colours (2 greens, brown, grey, white, and yellow) and a varicolour set-up for a total of 175 symbols. And one can easily add more as seen fit. The varicolour variant simply adds to the "top" side of the block - as seen in the above coastline - but should be equally suitable for anything that works with brown sides. Such as cakes.

With Group and Scale, sub-assembly certainly is an option. I used an isometric grid, clocking in at 1.524 (old habit of using metric units over 5 ft squares..) creating the polygons - but I reckon there is no such thing as a "master" scale to it. It's blocks, after all - and we can build what we want to.