JMark Afghans, etc. offers a variety of Afghan sizes, from lap warmers and crib blankets, to full- or queen-sized bedspreads.
The chart below explains what sizes are available for each style, the approximate measurements, and suggestions for where each size works best. (For example, 48"x75" would be perfect to drape across the back of a sofa or decorate a twin bed.)
Prices are based on my recommended Yarns. (Using other yarns may increase the price.)