Postage Stamp is Block 26 by Corey Yoder of Coriander Quilts.
Now this block will test your ¼" seam accuracy. If your seam is too small or too big, when you piece your D and E strips together, then your block will not fit easily.
I have followed the directions for both the cutting and piecing for this block.
I used a check from Easy Living Toweling for the centre of the 9" block and used a stripe from Lakeside Toweling for the final border on the 4 ½" block.
Apart from being accurate with your ¼" seam allowance I don't think there is anything further to add for this one,