The Clover 5-in-1 caliper should not be missing in any sewing box.
The 11 inch (27.9 cm) long device is a great help when accurately measuring and marking buttonholes and seam allowances. Thanks to its special length, thread runs can easily be marked very accurately.
In addition, Clover's extra large 5-in-1 calliper is used for measuring hems and for accurately measuring and drawing circles (as a compass and "T" gauge).
The Clover caliper gauge is a practical aid for sewing, Quilting and for interior design, which everyone should have handy