Answer: When it's a block from a swap.
The second set of 16 nine-patch blocks for the swap coordinated by Anina of Twiddletails showed up in my mailbox recently. Aren't they lovely? What an amazing variety of fabrics.
I blogged about the first set I received here. There will be one more set coming next month -- I can't wait to see what those will look like.
You can see the blocks that I made as my contribution on my blog posts here, here and here.
This has been great fun to participate in, however, like many block swaps, not all the blocks are 6 1/2 inches square. Most of the 32 blocks that I have received so far are fine, with a few being a smidgen over or under the 6 1/2 inches. Those can be dealt with fairly easily. A couple are a little more troublesome -- at least 1/4 inch bigger or smaller. There are always a number of reasons for this and I'm not surprised that this has happened with this swap.
As I mentioned in an earlier post, I will be putting these blocks into a simple quilt to be donated to Project Linus, so although I may have to struggle a bit with the inconsistency of the block sizes, I'm sure the recipient won't even notice the imperfections...