Bohin Expanding Buttonhole Guide

The measuring ruler for buttonholes gives you a quick and accurate measurement to place your buttons and buttonholes on all your garments. Quick and easy to use, it allows you to place 8 to 9 buttons spaced from 1 cm (ruler closed) to 8.7 cm (ruler unfolded).
How to use: lay the buttonhole measuring ruler on your garment. Extend it to the desired length to define a perfectly equal and precise spacing. 
An expandable sew gauge to mark locations...buttons, buttonholes, hooks, eyelets and even press studs will no longer hold any secrets for you. Using the dots and slots of the gauge, mark the position of the buttons and buttonholes with chalk or a washable marker.