Godiva's Secret Wigs offers large wigs in a variety of styles and color blends. Our Large Wigs have a 23" circumference size. To measure the circumference of your head, simply take a tape measure and place it at the middle of your forehead at the hairline. Then run the tape around the head, behind one ear, around the nape of the neck, behind the other ear, and then back to the front at the hairline. And as you look through our wigs, note that Short Wig, Medium Wig and Long Wig refer to the hair LENGTH of the wig. Petite, Average and Large refer to the cap SIZE of the wig. "LF" stands for Lace Front and "Mono" stands for Monofilament Top.