Stripology Squared RulerThe Stripology Squared Ruler lets you square up blocks up to 12 1 2in. Easy to read black and white markings. Whole inch and half inch increments are included. Cutting slots are every 1 2in. Markings for making 1 4in and 3 4in cuts are included. Use the black lines to square up blocks in whole inches up to 12in. Use the white lines to square up blocks in half inches up to 12 1 2in. 1 1 2in cuts are highlighted with black stars. 2 1 2in cuts are