CheckMate is the most complete user-friendly single-card checklist available. It is logical, concise, intuitive, and complete. With over 325 models of aircraft, you can be assured that you will find a CheckMate for almost any aircraft you want to fly. You have a graphical checklist that is the identical format for each plane you fly. The data will be exactly where you expect it to be. This provides a higher degree of comfort in flying - an important factor in aviation safety! CheckMate is available in 3 sizes for most aircraft: Standard (Single Engine 6.5" x 9" / Twin Engine 7" x 9.75") 9.25 font. By far, our most popular size. Will fit most tri-fold kneeboards but it is a tight fit. Compact (5" x 7") 6.5 pt. font. Nothing is deleted. Suggested only for those that can read small print. Pocket (3.75" x 6.25") 5.75 pt. font. Nothing deleted but print is very small. Best used as a study guide or as a backup checklist.