[martin417]

I don't know why they chose to use ordinate dimensioning for the drawings, it's needlessly confusing. (OD is great for CNC programming, but a pain when you are laying out the pattern on a sheet of plywood with a ruler) All the dimensions are on the drawing, but if you are not familiar with ordinate dimensioning it can be confusing

The side lengths are 16 1/2" (note the 8 1/4" Y dimension on the corner) and the perpendicular distance between sides are 28 1/2" (note the 14 1/4" X dimension on the vertical sides)