@Sheilago regarding March's Mini blocks ....
Unfortunately I got carried away making this and forgot to take pics at that point so its perfectly ok to get confused.
This is also the reason the blocks look so shabby from this point on as they have been unpicked from a completed block, so have been rudely manhandled!!!
For the CS to join up in the mini version we need an odd amount of strips ..
Instead of sewing together TWO complete blocks... which would mean having 3 light strips next to 3 light strips which would make a great clumpy mess. (If you imagine the top two blocks in the pic below sewn together you'll see what I mean)
We need to have one middle light strip with two light strips either side ... To achieve this, one of the blocks has to have an uneven amount of strips to the other.
So if you took one of the TOP blocks and sewed it to one of the BOTTOM blocks you will get the desired effect.
As for measurements at the stage shown above ...
The TOP blocks should measure 6 1/2" x 5"
and the BOTTOM blocks should measure 5 3/4" x 5"
Because we have yet to add the DARK strips to the top and bottom of the block which we are adding as continuous lengths instead of two strips after we have joined these ill bred units together!
If you were to make a quilt this way .. well you wouldnt ... this is done this way solely to make one block of almost 12 1/2" sq.