Most any sail loft or broker will have the specs for your boat. If you look at the link below for Bacons, a used sail broker in Annapolis, plug in your boat type you'll get the sail plan.Grampian 26 designed by McGruer I33.00 ISP33.00 J10.25 SPL10.25 P28.00 E11.10 Py0.00 Ey0.00 Check mains in stockCheck Jibs in stock Draft4.25 C/B0.00 PropOB Beam8.33 Disp5600 LWL21.75 UP S/D16.4 DW S/D34.1 D/L243 Year1967