I cut the 18 x 2 7/8 squares from across WOF and then now just read about the two 6 7/8 squares.
These are the two pieces left to cut - they are WOF x 10". Obviously I should have cut out the 6 7/8 squares first then played around with the 2 7/8 squares!!!
After cutting the 18 squares I am now left with only 4.25" x WOF to get the 6 7/8 squares.
Admiring my bundle of dark colours, even cut these on the diagonal - still didn't click in about the extra squares!
Life wasn't meant to be easy was it - I always say that I love a challenge, and I think I have found one!!