Not all 2-1/2" strips are exactly 2-1/2". Ballipops are hand cut inBali so there is some variations there.
Here's something I found that assures us 2-1/2" strips when sewn.
When sewing two strips together, rather than measuring 1/4" to the right of the needle position, I measure 2-1/4" to the left of the needle. A piece of blue painter's tape is placed along the left edge of the 2-1/4".
The fabric strips are positioned right
Make your own Reversible Tote Bag & Quilt it! (Videos to Watch) *Be sure to watch all of the videos in this series