Karen Kay Buckley’s Perfect Adjustable Square comes in a lovely box which will make a great storage container for the product. This square fits together like puzzle pieces allowing you to adjust the square. The inside of the square adjusts to the inch and the outside to the half inch: 4” interior to 24 ½” outside. The inside square can be used to mark your project and then add your seam allowance. The outside square can be used to mark or rotary cut the project. The box includes 4 corner units, 4 one inch, 4 two inch, 4 four inch and 4 eight inch units. This square has so many uses….squaring up pieced blocks, applique blocks, needlework projects, T-shirt quilts and so much more.