BCQLaur ... did your other pieces work out bang on for measurements? If so, then your 1/4" must be accurate!
Mine worked out OK for the measurements. I was skeptical and did one first as a check and I actually had a little extra that I could trim off. When I do HSTs and QSTs, I usually oversize the blocks, so I'm sure to have extra to trim off. it lets me make sure they are perfectly square!
If you're worried about sizing ... perhaps make your seam less than the 1/4" to give you the extra to trim off.
Good Luck!! ... and you know the story, show us your pictures! I'm anxious to see yours because of the totally different fabrics.
How about everyone else? .... updates?
Me? ... I haven't done the latest step. FWS blocks are all done so now I can get on the PC trail this weekend. Once I get this week's blocks done then I'll get my 4th BCS Clue done! I'm anxious to do it for a couple of reasons ... bigger pieces of fabric to work with than FWS/PC and of course, to see how it looks at this next stage!