I just came across the posts about the Snowball ruler by Ruler Revolution and enjoyed reading the comments. I love Snowball blocks but found cutting and marking little squares to be sewn on the corners of larger squares too time consuming. Plus my blocks always wanted to skew out of shape. So, invented the ruler and technique whereby only two squares the same size are used to construct the block. The two squares are placed right sides together. Then, the ruler lined up on the squares using the designated lines on the rulers. The four corner sewing lines are marked in the slots in the ruler and quickly sewn. The top fabric is cut through the middle horizontally and vertically and pressed out towards the four corners. The blocks are trimmed up and viola, in two minutes you have a perfect Snowball block. This same ruler can be used to snowball any size square or rectangle and to miter corners perfectly and simply. Addition videos are coming soon to the website located at
www.rulerrevolution.com. I welcome any questions or comments.