Our stock covers are constructed using the same high quality material and sewing techniques as our custom covers. We offer these in limited colors that we buy in larger quantities, allowing us to offer them at a lower price. We try to keep these covers in stock allowing for a faster turn around time when you order. We offer these aerobatic airplane covers in 4 different sizes ranging from 25%-43% monoplanes. While these covers may not be custom made for the dimensions of your plane, they will fit most planes on the market just fine and they will certainly do the job of protecting your plane from the sun.